- Study of earth and rocks — Geology.
- Study of living things — Biology.
- Study of celestial bodies —Astronomy.
- Study of the influence of planets and stars — Astrology.
- Scientific study of bodily diseases — Pathology.
- Study of languages — Philology.
- Study of bees — Apiology.
- Study of heart/heart diseases — Cardiology.
- Study of dogs — Cynology.
- Study of trees — Dendrology.
- Study of religion — Theology.
- Study of heredity — Genetics.
- Study of coins — Numismatics.
- Study of birds — Ornithology.
- Study of human development — Anthropology.
- Study of science of insects — Entomology.
- Study of problems of old age — Gerontology.
- Study of relation between organism and environment — Ecology.
- Study of flying aeroplanes — Aviation.
- Study of skin/skin diseases — Dermatology.
- Study of wine/wine making — Enology/Oenology.
- Study of cats — Felinology.
- Study of medicine for women — Gynecology/ Gynaecology.
- Study of arthropod and reptiles — Hepatology.
- Study ofhorses — Hippology.
- Study of water — Hydrology.
- Study of weather — Meteorology.
- Study of kidneys and their diseases — Nephrology.
- Study of nerves — Neurology.
- Study of cancer — Oncology.
- Study of eggs — Oology.
- Study of eyes — Ophthalmology.
- Study of mountains and their mapping — Orology
- Study of bones — Osteology.
- Study of rocks — Petrology.
- Study of earthquakes — Seismology.
- Study of snakes — Serpentology.
- Study of mouth and its diseases — Stomatology.
- Study of poisons (w) — Toxicology.
- Study of flags – Vexillology.
- Study of animals — Zoology.
- Study of medicine for children and their diseases—Paediatrics/Pediatrics.
- Study of broken bones — Orthopaedics.
- Study of hand writing — Graphology.
- Art of good handwriting — Calligraphy.
- A written message from far off place — Telegraph.
- An expert in writing by hand — Chirographer.
- A person who write dictionaries — Lexicographer.
- Written by light — Photograph.
- An expert in writing (drawing) maps — Cartographer
- Writing of one’s life story —Biography.
- Writing of one’s won life story — Autobiography.
- Process of printing from a plate — Lithography.
- Self-rule or control — Autonomy.
- A self moving vehicle — Automobile.
- A machine that functions by itself — Automatic.
- A signature of oneself — Autograph.
- One with unlimited power — Autocrat.
- Love for mankind — Philanthropy.
- One who loves books as collection — Bibliophile.
- One who loves women — Philogyny.
- One who loves men — Androphile.
- One who loves wisdom — Philosopher.
- One who is all powerful — Omnipotent
- Almighty One who is all knowing — Omniscient.
- One who is present all over — Omnipresent.
- One who eats all kinds of food — Omnivorous.
- A book containing all the published work of an author —Omnibus.
- Study of religion — Theology.
- One who believes in God — Theist.
- One who believes in one God —Monotheist.
- One who believes in many Gods — Polytheist.
- One who believes the presence of God in everything in the universe– Pantheist.
- Practicing only one marriage (having only one wife) — Monogamy.
- Practicing two marriages — Bigamy.
- Practicing several marriages (having many wives) — Polygamy.
- One who hates marriage — Misogamy.
- Having several husbands — Polyandry.
- One who hates men — Misandrist.
- People who have both male and female sexual organs — Gynandries.
- People having both male and female characteristics — Androgynous.
- The study of human development — Anthropology.
- One who hates women — Misogynist.
- One who hates marriage — Misogamist.
- One who loves his fatherland (country) — Patriot.
- One who loves mankind — Philanthropist.
- One who hates humans — Misanthrope.
- One who hates men — Misandrist.
- An inheritance from father — Patrimony.
- The state of being father — Paternity.
- The killing of a father — Patricide.
- A system ruled by father/men — Patriarchy.
- The rule or control of mother — Matriarchy.
- The killing of a whole race — Genocide.
- The killing of a new born child — Infanticide.
- The killing of a king — Regicide.
- The killing of a human being — Homicide.
- The killing of oneself — Suicide.
- The killing of a mother — Matricide.
- The school or college one attends — Alma Mater.
- The killing of one’s own brother — Fratricide.
- The killing of one’s sister — Sororicide.
- The killing of one’s wife — Uxoritide.
- The killing of one’s husband — Mariticide.
- The killing of parents — Parricide.
- To walk aimlessly — Amble.
- A baby carriage — Perambulator (Pram).
- Carriage for sick people — Ambulance.
- One who walks in sleep — Somnambulist.
- One who walks at night — Noctambulist.
- One who walks on ropes — Funambulist.
- Living on flesh — Carnivorous.
- Living on grass — Herbivorous.