One word substitution –
The life history of a person written by himself – Autobiography
One who doesn’t believe in God – Atheist
An assembly of listeners – Audience
A Person who practices craft – Artisan
One who plays game for pleasure but not professionally – Amateur
Without the name of the author – Anonymous
Study of customs of primitive man – Agriology
Art and practice of designing and construction of buildings . – Architecture
An expert in Architecture – Architect
Study related to stars, planets, sky , satellite etc. – Astronomy
One who studies the science of star, planet, sky, satellite etc. – Astronomer
A traveler through outer space – Astronaut
The want if government in a country – Anarchy
Which can be approached – Accessible
A person who is an expert in insurance – Actuary
Public building in which the audience sits – Auditorium
A place where birds are kept – Aviary
A place where bees are kept – Apiary
A person who represents his country for economical, political and other interests in another country – Ambassador
The science related to the development of mankind – Anthropology
One who resides in country of which he is not a citizen – Alien
An artificial pond to keep and show living fish – Aquarium
Which can be heard – Audible
Which can’t be heard – Inaudible
Study of human society, culture and development – Anthropology
Expert in Anthropology – Anthropologist
Study of past culture of human – Archaeology
Expert in Archaeology – Archaeologist
Study of the structure of animals and plants – Anatomy
Yearly return of the date – Anniversary
Which belongs to a distant past – Ancient
Study of wind – Anemology
From whom one is descended – Ancestor
A person trained for physical exercise or outdoor sports – Athlete
Study of algae – Algology / Phycology
Study of flowers – Anthology
One who abandons his religious faith -Apostate
Government by nobles – Autocracy
Study of bees – Apiology
Science of life and living things – Biology
A man who remains unmarried – Bachelor
Unable to pay debt – Bankrupt / Insolvent
The life history of a person written by another person – Biography
Study of Life – Biology
Expert in Biology – Biologist
Study of chemical reactions – Biochemistry
Expert in Biochemistry – Biochemist
Who writes about the life of other person – Biographer
Practice of having two wives or husbands – Bigamy
Which happens after every two years – Biennial
Study of physical characteristics of living system -: Biophysics
Study of technology for the biological processes of organisms – Biotechnology
Expert in Biotechnology – Biotechnologist
A person who smuggles alcoholic liquor or sells illegally – bootlegger
Study related to plants – Botany
Expert in Botany – Botanist
Government by officials – Bureaucracy
Study of Bryophytes – Bryology
List of months , weeks , days of a particular year – Calendar
A hundred years – Century
Dead body of a human being- Corpse
Dead body of an animal – Carcase
That can be spread by touch – Contagious
A list of goods / books / designs – Catalogue
Pertaining to the sky – Celestial
A person who deals in sweets – Confectioner
Which makes difficult to recognise the presence – Camouflage
Ground and area of a school or college or institution or university where the main buildings are – Campus
Study of heart and its functions – Cardiology
Expert in Cardiology – Cardiologist
Study of map – Cartography
Study of climate – Climatology
Expert in Climatology – Climatologist
Study of Cosmetics – Cosmetology
Official in charge of a museum – Curator
Study of shells – Conchology
Study of whales – Cetology
From all part of the world / One who is familiar with many different countries – Cosmopolitan
Group of military operations with a set of purpose usually in one area – Campaign
Government run by an absolute ruler – Dictatorship
Study of skulls – Craniology
Study of crime and criminal – Criminology
Study of cells – Cytology
Study of Chemical and reactions – Chemistry
Expert in Chemistry – Chemist
Study of trees and shrubs – Dendrology
A person who lives on other and doesn’t work – Drone
A Government run by the representatives of the people – Democracy
Study of diet – Dietetics
Expert in Dietetics – Dietician
One who is descended from a particular ancestor – Descendant
A place where ships are built – Dockyard
Done without any previous preparation – Extempore
Study of organisms and their environment – Ecology
A branch of science and technology concerned with the design , building and uses of engines, machines and tools – Engineering
An expert in Engineering – Engineer
Expert in Ecology – Ecologist
Study of Economy – Economics
Expert in Economy – Economist
Study of embryos – Embryology
A person who holds extreme views – Extremist
Sudden happening which need quick action – Emergency
A person who goes another country from his own country to settle – Emigrant
A person sent on a official mission – Emissary
Study of insect – Entomology
Expert in Entomology – Entomologist
Study of cultural heritage – Ethnology
Study of causes and reasons – Etiology
A book of knowledge and information –
Encyclopaedia
Study of life in space – Exobiology
Who wastes money for luxury – Extravagant.
A person who sends goods to another country – Exporter
Fit to be eaten – Edible
Study of animal behaviour – Ethology
Study of words and their origins – Etymology
Resulting in death – Fatal
One who believes implicitly in fate – Fatalist
Study of flower farming – Floriculture
Study of grasses – Graminology / Agrostology
Subject to death – Mortal
Study of Earth and its physical structures and substance – Geology
An expert in Geology – Geologist
Study of Earth and its physical features, atmosphere, human lives and environment – Geography
An expert in Geography – Geographer
Study of handwriting – Graphology
Expert in Graphology – Graphologist
Study of gems and jewels – Gemmology
Study about the care of elderly or Study of different aspects of aging – Gerontology
Expert in Gerontology – Gerontologist
Incapable of making mistakes or doing wrong – Infallible
Study of blood – Haematology / Hematology
Expert in Haematology – Haematologist / Haematologist
Study of water – Hydrology
Expert in Hydrology – Hydrologist
Study of cultivation of fruits, ornamental plants, vegetables, flowers – Horticulture
Expert in Horticulture – Horticulturist
Study of liver – Hepatology
Study of horses – Hippology
Murder of human beings – Homicide
Study of parasitic worms – Helminthology
Study of reptiles and amphibians – Herpetology
Study of the tissues of organisms – Histology
Study of past and evolution of human civilization – History
Related to history or concerning past event – Historical
Important in history – Historic
Which can be corrected or reformed- Corrigible
Work without pay and with honor – Honorary
Which can’t be accessed or approached – Inaccessible
Study of fish – Ichthyology
Who can’t be selected as per the rules – Ineligible
Who can be selected as per the rules – Eligible
Which can’t be blotted out or effaced – Indelible
Study of ideas – Ideology
Which can’t be done without – Indispensable
Which can’t be destroyed – Indestructible
Which can’t be explained – Inexplicable
Soldiers who fight on horse – back – infantry
Person having no belief in religion – Infidel
Which can’t be divided – Indivisible
Receive as an heir as the death of a previous holder – Inherit
Which can’t be corrected or reformed – Incorrigible
Going back from the reach of the memory – Immemorial
A person who brings goods from another country – Importer
A person who comes to a new country to settle – Immigrant
Study of immune system – Immunology
No favoring one more than another – Impartial
Which can’t be perceived by senses – Imperceptible
Still not developed fully – Immature
Which can be understood easily – Intelligible
That may be easily set in fire – Inflammable
Who can’t make any mistake – Infallible
That which can’t be believed – Incredible
Which is going to be happened surely – Inevitable
Which can be spread by means of germs carried in the atmosphere or in water – Infectious.
Which can’t be recalled or altered – Irrevocable
Difficult or impossible to read – illegible
Unable to read or write – illiterate
Which can’t be solved – Insoluble
Which can’t be conquered – Invincible
Study of structure and function of cell nucleus – Karyology
Expert in human beauty – Beautician
Study of human beauty – Katology
A place where lab works, chemical reaction or practical works happen – Laboratory
Study of lichens – Lichenology
Where books are collected for readers – Library
An expert in Library Science / An professional who manages library – Librarian
A song to put baby to sleep – Lullaby
Study of inland water – Limnology
Study of lipid – Lipidology
A man who studies languages scientifically- Linguist
Study of ants – Myrmecology
Study of music – Musicology
An expert in music – Musician
Study of the mollusk – Malacology
Study of climate and weather – Meteorology
Expert in Meteorology – Meteorologist
Study of mammals – Mammology
A work of outstanding skills, artistry – Masterpiece
Handwritten document – Manuscript
Study of microscopic life or microorganisms – Microbiology
An expert in Microbiology – Microbiologist
One who undergoes a penalty of death for persistence in his faith – Martyr
One who fights for money – Mercenary
Study of museum – Museology
Study of Fungi – Mycology
A person who loves wealth for his own sake and don’t want to spend it – Miser
Study of sums, maths and equation – Mathematics
An expert in Mathematics – Mathematician
Related to magic – Magical
An expert in magic – Magician
Something boring or dull – Monotonous
Who believes in one God – Monotheist
Practice of being married to only one person at a time – Monogamy
A person who practices minimalism – Minimalist
One who hates mankind – Misanthropist
Study of muscular system – Myology
Study of structure of organisms – Morphology
Study of nervous system- Neurology
An expert in Neurology- Neurologist
Helping or supporting neither side – Neutral
Study of nephron – Nephrology
An expert in Nephrology – Nephrologist
Study of clouds – Nephology
Study of diseases – Nosology
One having a evil reputation – Notorious
Study of new born baby upto 2 years of age – Neonatology
Study of brain – Neuroanatomy
An expert in the field of nutrition – Nutritionist
Which is no longer in use – Obsolete
Study of teeth – Odontology
An expert in dental science and medicine – Dentist
Study of cultivation of vegetables – Olericulture
One who is all – powerful – Omnipotent
One who is present everywhere – Omnipresent
One who eats everything – Omnivore
One who knows everything – Omniscient
Study of tumor – Oncology
An expert in Oncology – Oncologist
Study of wines – Oenology
Study of eyes – Ophthalmology
One who treats eye diseases – Ophthalmologist
Study of Ocean – Oceanography
An expert in Oceanography – Oceanographer
One who looks at the bright side of a thing – Optimist .
That can’t be seen through – Opaque
Study of eggs – Oology
Study of light – Optics
One who makes an eloquent public speech – Orator
Study of ears – Otology
Study of snakes – Ophiology
A child whose parents are death – Orphan
An expert of human bones and structure – Orthopaedic
Study of the organs of animals and plants – Organology
Study of the skeleton system – Osteology
Notice of a person’s death – Obituary
Study of birds – Ornithology
An expert in Ornithology – Ornithologist
Study related to lungs and chest – Pulmonology
An expert in Pulmonology – Pulmonogist
Study of ancient human – Palaeoanthropology
Study of ancient life – Paleobiology
Study of the fossil – Palaeontology
A person who is a great lover of his country – Patriot
Study of pollen grains – Palynology
A base on which a statute or column is mounted – Pedestal
Study of soils – Pedology
Study of rocks – Petrology
Study related to child – Pediatrics
An expert in Pediatrics – Pediatrician
Study of ancient animal – Paleozoology
Study of Parasite – Parasitology
Study of disease – Pathology
An expert in Pathology – Pathologist
A person who loves or serves mankind – Philanthropist
One who collects postage – stamps – Philatelist
Study of nature and properties of matter and energy – Physics
Related to the body – Physical
An expert in physiotherapy – Physiotherapist
Study of supernatural beings – Phantomology
Study of periodic Biological phenomenon –
Phenology
Study of speech sounds – Phonology
Study related to words phrases – Phraseology
Study of drug – Pharmacology / Pharmacy
An expert in Pharmacology or Pharmacy – Pharmacologist / Pharmacist
Study of postage stamp – Philately
Study of human mind and behaviour – Psychology
An expert in Psychology – Psychologist
Related to human mind – Psychological
Treatment of mental disease – Psychiatry
One Who treats a mental patient – Psychiatrist
Study of ancient text and historical languages – Philology
Study of fruits – Pomology
Study of war – Polemology
A plant or animal who draws sustenance from another – Parasite
Study of algae – Phycology
Study of characteristics of organisms – Physiology
An expert in Physiology – Physiologist
Study of plants – Phytology
Study of fire – Pyrology
One who takes a dark side of things – Pessimist
Study of the fundamental nature of knowledge – Philosophy
An expert in Philosophy – Philosopher
A person walking along a road or in a developed area – Pedestrian
A cure of all the diseases – Panacea
One Who knows many languages – Polyglot
Happening after the death – Posthumous
One who is going to a holy place – Pilgrim
Custom of having more than one wife at the same time – Polygamy
Custom of having more than one husband at the same time – Polyandry
An operation performed on a dead body to find out the cause of death – Post – mortem
Government by the people or their elected representatives – Republic
Study related to Robot – Robotics
Study related to radiation – Radiology
An expert in radiology – Radiologist
Study of the nose and olfactory organs – Rhinology
Study of the society – Sociology
An expert in Sociology – Sociologist
Study of lizards – Saurology
Study of the immunological properties and serum – Serology
One who always doubts – Sceptic
Happening in the same time – Simultaneously
Person who searched for usable objects among rubbish or animals that search for decaying flesh as food – Scavenger
One who is made to suffer for another – scapegoat
Study of the moon – Selenology
Study of the earthquake – Seismology
Machine measure earthquake – Seismograph
A person who transport good illegally or secretly into or out of the country – Smuggler
A person who spends extravagantly –
Spendthrift
Study of internal organs – Splanchology
Study of stats and data – Statistics
An expert in Statistics – Statistician
Study of ligament – Syndesmology
A woman who remains unmarried – Spinster
Study of human characteristics – Somatology
Study of stories and legends – Storiology
A person indifferent to both pleasure and pain – Stoic
Study of seals – Sigillography
Study of caves – Speleology
The branch associated with the naming and classification of organisms – Taxonomy
One who believes in the existence of God – Theist
Study of religion – Theology
An expert in Theology – Theologist
Study of heat – Thermology
A container to store hot water – Thermoflux
Study of wounds – Traumatology
A person who visits different country and places for pleasure – Tourist
Study of characteristics and history of a place – Topology
Study of the different features of land – Topography
Study of nutrition – Trophology
Allowing light to pass through so that object behind can be seen – Transparent
One who abstains from alcoholic drinks – Teetotaller
Study of adverse effect in the living organisms – Toxicology
A study related to use of modern technique – Technology
An expert in technique – Technologist
Who eats human flesh – Cannibal
All of one mind / All are agreed together – Unanimous
One who lends money at exorbitant rates of interest – Usurer
Study of urine and related diseases – Urology
An expert in Urology – Urologist
Study of viruses – Virology
An expert in Virology – Virologist
One who had long experience of service or occupation or has grown old in that service or occupation – Veteran
One who abstains from animal foods , especially meat – Vegetarian
Study of Volcanoes – Volcanology
Which can be seen – Visible
Study of flags – Vexillology
Which can’t be seen – Invisible
A man whose wife is dead – Widower
A woman whose husband is dead – Widow
A place to keep clothes – Wardrobe
Study of fermentation process – Zymology
A place where animals, reptiles and birds are kept for the entertainment of people – Zoo
Study of animals – Zoology
An expert in Zoology – zoologist
Study of handicapped animals – Zoonosology
Study of beer – Zythology