| aerology | (noun) meteorology of the total extent of the atmosphere; especially the upper layers | - |
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| aetiology | (noun) the philosophical study of causation | Synonyms: etiology |
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| (noun) the cause of a disease | Synonyms: etiology |
| agrobiology | (noun) the study of plant nutrition and growth especially as a way to increase crop yield | - |
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| agrology | (noun) science of soils in relation to crops | - |
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| algology | (noun) the branch of botany that studies algae | Synonyms: phycology |
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| allergology | (noun) the branch of medical science that studies the causes and treatment of allergies | - |
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| allergy | (noun) hypersensitivity reaction to a particular allergen; symptoms can vary greatly in intensity | Synonyms: allergic reaction |
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| amphibology | (noun) an ambiguous grammatical construction; e.g., `they are flying planes' can mean either that someone is flying planes or that something is flying planes | Synonyms: amphiboly |
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| analogy | (noun) drawing a comparison in order to show a similarity in some respect | - |
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| (noun) an inference that if things agree in some respects they probably agree in others | - |
| (noun) the religious belief that between creature and creator no similarity can be found so great but that the dissimilarity is always greater; any analogy between God and humans will always be inadequate | Synonyms: doctrine of analogy |
| androgyne | (noun) one having both male and female sexual characteristics and organs; at birth an unambiguous assignment of male or female cannot be made | Synonyms: epicene, epicene person, gynandromorph, hermaphrodite, intersex |
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| androgyny | (noun) showing characteristics of both sexes | Synonyms: bisexuality, hermaphroditism |
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| anergy | (noun) reduction or lack of an immune response to a specific antigen | - |
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| (noun) inactivity and lack of energy | - |
| anesthesiology | (noun) the branch of medical science that studies and applies anesthetics | - |
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| angelology | (noun) the branch of theology that is concerned with angels | - |
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| angiology | (noun) the branch of medical science that studies the blood and lymph vessels and their disorders | - |
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| anthology | (noun) a collection of selected literary passages | - |
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| anthropology | (noun) the social science that studies the origins and social relationships of human beings | - |
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| anthropophagy | (noun) human cannibalism; the eating of human flesh | - |
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| apology | (noun) a poor example | Synonyms: excuse |
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| (noun) an expression of regret at having caused trouble for someone | - |
| (noun) a formal written defense of something you believe in strongly | Synonyms: apologia |
| archaeology | (noun) the branch of anthropology that studies prehistoric people and their cultures | Synonyms: archeology |
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| archeology | (noun) the branch of anthropology that studies prehistoric people and their cultures | Synonyms: archaeology |
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| argyle | (noun) a sock knitted or woven with an argyle design | Synonyms: argyll |
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| (noun) a design consisting of a pattern of varicolored diamonds on a solid background (originally for knitted articles); patterned after the tartan of a clan in western Scotland | Synonyms: argyll |
| (noun) a covered gravy holder of silver or other metal containing a detachable central vessel for hot water to keep the gravy warm | Synonyms: argyll |
| argyll | (noun) a sock knitted or woven with an argyle design | Synonyms: argyle |
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| (noun) a design consisting of a pattern of varicolored diamonds on a solid background (originally for knitted articles); patterned after the tartan of a clan in western Scotland | Synonyms: argyle |
| (noun) a covered gravy holder of silver or other metal containing a detachable central vessel for hot water to keep the gravy warm | Synonyms: argyle |
| argyrodite | (noun) a rare steel-grey mineral consisting of silver and germanium and sulfur | - |
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| astrobiology | (noun) the branch of biology concerned with the effects of outer space on living organisms and the search for extraterrestrial life | Synonyms: exobiology, space biology |
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| astrology | (noun) a pseudoscience claiming divination by the positions of the planets and sun and moon | Synonyms: star divination |
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| asynergy | (noun) absence of coordination of organs or body parts that usually work together harmoniously | Synonyms: asynergia |
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| audiology | (noun) the measurement of hearing | Synonyms: audiometry |
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| autogyro | (noun) an aircraft that is supported in flight by unpowered rotating horizontal wings (or blades); forward propulsion is provided by a conventional propeller | Synonyms: autogiro, gyroplane |
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| axiology | (noun) the study of values and value judgments | - |
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| bacteriology | (noun) the branch of medical science that studies bacteria in relation to disease | - |
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| bioclimatology | (noun) the study of effects of climate on living organisms | - |
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| biology | (noun) the science that studies living organisms | Synonyms: biological science |
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| (noun) all the plant and animal life of a particular region | Synonyms: biota |
| (noun) characteristic life processes and phenomena of living organisms | - |
| biotechnology | (noun) the branch of engineering science in which biological science is used to study the relation between workers and their environments | Synonyms: bioengineering, ergonomics |
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| (noun) the branch of molecular biology that studies the use of microorganisms to perform specific industrial processes | Synonyms: biotech |
| bogy | (noun) an unidentified (and possibly enemy) aircraft | Synonyms: bogey, bogie |
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| (noun) a bogle or goblin; where used as a proper name, the Devil | Synonyms: bogey, bogie |
| buggy | (noun) a small lightweight carriage; drawn by a single horse | Synonyms: roadster |
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| bugology | (noun) the branch of zoology that studies insects | Synonyms: entomology |
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| cardiology | (noun) the branch of medicine dealing with the heart and its diseases | - |
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| chemoimmunology | (noun) the field of chemistry concerned with chemical processes in immunology (such as chemical studies of antigens and antibodies) | Synonyms: immunochemistry |
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| chirology | (noun) telling fortunes by lines on the palm of the hand | Synonyms: chiromancy, palm reading, palmistry |
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| chronology | (noun) the determination of the actual temporal sequence of past events | - |
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| (noun) a record of events in the order of their occurrence | - |
| (noun) an arrangement of events in time | - |
| clergy | (noun) in Christianity, clergymen collectively (as distinguished from the laity) | - |
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| clergyman | (noun) a member of the clergy and a spiritual leader of the Christian Church | Synonyms: man of the cloth, reverend |
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| climatology | (noun) meteorology of climates and their phenomena | - |
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| coelogyne | (noun) any of various orchids of the genus Coelogyne with: clusters of fragrant lacy snow-white flowers; salmon-pink solitary flowers; chainlike racemes of topaz and chocolate brown flowers; spikes of delicate white spice-scented flowers; emerald green flowers marked with blue-black | - |
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| conchology | (noun) the collection and study of mollusc shells | Synonyms: shell collecting |
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| coprophagy | (noun) eating feces; in human a symptom of some kinds of insanity | Synonyms: coprophagia |
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| cosmetology | (noun) the practice of beautifying the face and hair and skin | - |
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| cosmology | (noun) the branch of astrophysics that studies the origin and evolution and structure of the universe | Synonyms: cosmogeny, cosmogony |
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| (noun) the metaphysical study of the origin and nature of the universe | - |
| craniology | (noun) the scientific study of the skulls of various human races | - |
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| criminology | (noun) the scientific study of crime and criminal behavior and law enforcement | - |
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| cryobiology | (noun) the branch of biology that studies the effects of low temperatures on living tissues or organs or organisms | - |
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| cryptology | (noun) the science of analyzing and deciphering codes and ciphers and cryptograms | Synonyms: cryptanalysis, cryptanalytics, cryptography |
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| cytology | (noun) the branch of biology that studies the structure and function of cells | - |
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| demagogy | (noun) impassioned appeals to the prejudices and emotions of the populace | Synonyms: demagoguery |
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| dendrology | (noun) the study of wooden plants | - |
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| dermatology | (noun) the branch of medicine dealing with the skin and its diseases | - |
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| dialectology | (noun) the branch of philology that is devoted to the study of dialects | - |
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| doggy | (noun) informal terms for dogs | Synonyms: barker, bow-wow, doggie, pooch |
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| dogy | (noun) motherless calf in a range herd of cattle | Synonyms: dogie, leppy |
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| doxology | (noun) a hymn or verse in Christian liturgy glorifying God | - |
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| dramaturgy | (noun) the art of writing and producing plays | Synonyms: dramatic art, dramatics, theater, theatre |
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| ecclesiology | (noun) the branch of theology concerned with the nature and the constitution and the functions of a church | - |
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| ecology | (noun) the branch of biology concerned with the relations between organisms and their environment | Synonyms: bionomics, environmental science |
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| (noun) the environment as it relates to living organisms | - |
| effigy | (noun) a representation of a person (especially in the form of sculpture) | Synonyms: image, simulacrum |
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| elegy | (noun) a mournful poem; a lament for the dead | Synonyms: lament |
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| embryology | (noun) the branch of biology that studies the formation and early development of living organisms | - |
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| endocrinology | (noun) the branch of medicine dealing with the endocrine glands and their secretions | - |
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| energy | (noun) forceful exertion | Synonyms: vigor, vigour, zip |
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| (noun) an imaginative lively style (especially style of writing) | Synonyms: muscularity, vigor, vigour, vim |
| (noun) enterprising or ambitious drive | Synonyms: get-up-and-go, push |
| (noun) (physics) a thermodynamic quantity equivalent to the capacity of a physical system to do work; the units of energy are joules or ergs | Synonyms: free energy |
| (noun) any source of usable power | - |
| (noun) a healthy capacity for vigorous activity | Synonyms: vim, vitality |
| enology | (noun) the art of wine making | Synonyms: oenology |
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| entomology | (noun) the branch of zoology that studies insects | Synonyms: bugology |
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| enzymology | (noun) the branch of biochemistry dealing with the chemical nature and biological activity of enzymes | - |
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| epidemiology | (noun) the branch of medical science dealing with the transmission and control of disease | - |
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| epistemology | (noun) the philosophical theory of knowledge | - |
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| escapology | (noun) the study of methods of escaping (especially as a form of entertainment) | - |
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| eschatology | (noun) the branch of theology that is concerned with such final things as death and Last Judgment; Heaven and Hell; the ultimate destiny of humankind | - |
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| esthesiology | (noun) the scientific study or description of the sense organs and sensations. | - |
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| ethnology | (noun) the branch of anthropology that deals with the division of humankind into races and with their origins and distribution and distinctive characteristics | - |
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| ethology | (noun) the branch of zoology that studies the behavior of animals in their natural habitats | - |
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| etiology | (noun) the philosophical study of causation | Synonyms: aetiology |
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| (noun) the cause of a disease | Synonyms: aetiology |
| etymology | (noun) the study of the sources and development of words | - |
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| (noun) a history of a word | - |
| eulogy | (noun) a formal expression of praise for someone who has died recently | Synonyms: eulogium |
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| (noun) a formal expression of praise | Synonyms: encomium, paean, panegyric, pean |
| exobiology | (noun) the branch of biology concerned with the effects of outer space on living organisms and the search for extraterrestrial life | Synonyms: astrobiology, space biology |
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| fetology | (noun) the branch of medicine concerned with the fetus in the uterus | Synonyms: foetology |
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| foetology | (noun) the branch of medicine concerned with the fetus in the uterus | Synonyms: fetology |
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| fogy | (noun) someone whose style is out of fashion | Synonyms: dodo, fogey, fossil |
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| fossilology | (noun) the earth science that studies fossil organisms and related remains | Synonyms: palaeontology, paleontology |
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| futurology | (noun) the study or prediction of future developments on the basis of existing conditions | Synonyms: futuristics |
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| garbology | (noun) the study of a society by analyzing its garbage | - |
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| gastroenterology | (noun) the branch of medicine that studies the gastrointestinal tract and its diseases | - |
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| genealogy | (noun) the study or investigation of ancestry and family history | - |
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| (noun) successive generations of kin | Synonyms: family tree |
| geology | (noun) a science that deals with the history of the earth as recorded in rocks | - |
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| geomorphology | (noun) the branch of geology that studies the characteristics and configuration and evolution of rocks and land forms | Synonyms: morphology |
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| geophagy | (noun) eating earth, clay, chalk; occurs in some primitive tribes, sometimes in cases of nutritional deficiency or obsessive behavior | Synonyms: geophagia |
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| geostrategy | (noun) the branch of geopolitics dealing with strategy | - |
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| gerontology | (noun) the branch of medical science that deals with diseases and problems specific to old people | Synonyms: geriatrics |
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| glottochronology | (noun) the determination of how long ago different languages evolved from a common source language | - |
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| graphology | (noun) the study of handwriting (especially as an indicator of the writer's character or disposition) | - |
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| gym | (noun) athletic facility equipped for sports or physical training | Synonyms: gymnasium |
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| gymel | (noun) the technique, found in some medieval English music, of singing voice parts in parallel thirds. | - |
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