| abecedarian | (adjective) alphabetically arranged (as for beginning readers) | - |
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| (noun) a novice learning the rudiments of some subject | - |
| academician | (noun) an educator who works at a college or university | Synonyms: academic, faculty member |
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| (noun) a scholar who is skilled in academic disputation | Synonyms: schoolman |
| (noun) someone elected to honorary membership in an academy | - |
| acanthopterygian | (noun) a teleost fish with fins that are supported by sharp inflexible rays | Synonyms: spiny-finned fish |
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| acoustician | (noun) a physicist who specializes in acoustics | - |
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| actinian | (noun) any sea anemone or related animal | Synonyms: actinia, actiniarian |
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| actiniarian | (noun) any sea anemone or related animal | Synonyms: actinia, actinian |
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| actinomyxidian | (noun) of or relating to parasites of worms | - |
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| aeonian | (adjective) of or relating to a geological eon (longer than an era) | Synonyms: eonian |
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| (adjective) continuing forever or indefinitely | Synonyms: ageless, eonian, eternal, everlasting, perpetual, unceasing, unending |
| aesculapian | (adjective) of or belonging to Aesculapius or the healing art | Synonyms: medical |
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| aesthetician | (noun) a philosopher who specializes in the nature of beauty | Synonyms: esthetician |
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| (noun) a worker skilled in giving beauty treatments (manicures and facials etc.) | Synonyms: esthetician |
| agrarian | (adjective) relating to farming or agriculture | Synonyms: agricultural, farming |
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| alsatian | (noun) breed of large shepherd dogs used in police work and as a guide for the blind | Synonyms: German police dog, German shepherd, German shepherd dog |
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| ambrosian | (adjective) worthy of the gods | Synonyms: ambrosial |
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| (adjective) extremely pleasing to the taste; sweet and fragrant | Synonyms: ambrosial, nectarous |
| amphibian | (adjective) relating to or characteristic of animals of the class Amphibia | Synonyms: amphibious |
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| (noun) cold-blooded vertebrate typically living on land but breeding in water; aquatic larvae undergo metamorphosis into adult form | - |
| (noun) an airplane designed to take off and land on water | Synonyms: amphibious aircraft |
| (noun) a flat-bottomed motor vehicle that can travel on land or water | Synonyms: amphibious vehicle |
| antediluvian | (adjective) of or relating to the period before the biblical flood | Synonyms: antediluvial |
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| (adjective) so extremely old as seeming to belong to an earlier period | Synonyms: antiquated, archaic |
| (noun) a very old person | Synonyms: ancient |
| (noun) any of the early patriarchs who lived prior to the Noachian deluge | Synonyms: antediluvian patriarch |
| antemeridian | (adjective) before noon | - |
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| antiauthoritarian | (adjective) opposed to authoritarianism | - |
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| antinomian | (adjective) relating to or influenced by antinomianism | - |
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| (noun) a follower of the doctrine of antinomianism | - |
| antiquarian | (adjective) of or relating to antiques or antiquities | - |
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| (adjective) of or relating to persons who study or deal in antiques or antiquities | - |
| (noun) an expert or collector of antiquities | Synonyms: antiquary, archaist |
| apian | (adjective) relating to or having the characteristics of bees | - |
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| apiarian | (adjective) relating to bees or beekeeping | - |
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| arachnidian | (adjective) relating to or resembling a member of the class Arachnida | Synonyms: arachnoid, spiderlike, spiderly, spidery |
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| arcadian | (adjective) (used with regard to idealized country life) idyllically rustic | Synonyms: bucolic, pastoral |
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| archosaurian | (adjective) of or relating to reptiles of the subclass Archosauria | - |
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| (noun) extinct reptiles including: dinosaurs, plesiosaurs, pterosaurs, ichthyosaurs, thecodonts | Synonyms: archosaur, archosaurian reptile |
| arithmetician | (noun) someone who specializes in arithmetic | - |
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| artesian | (adjective) (of water) rising to the surface under internal hydrostatic pressure | - |
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| ascidian | (noun) minute sedentary marine invertebrate having a saclike body with siphons through which water enters and leaves | - |
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| authoritarian | (adjective) expecting unquestioning obedience | Synonyms: dictatorial, overbearing |
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| (adjective) characteristic of an absolute ruler or absolute rule; having absolute sovereignty | Synonyms: autocratic, despotic, dictatorial, tyrannic, tyrannical |
| (noun) a person who behaves in a tyrannical manner | Synonyms: dictator |
| avian | (adjective) pertaining to or characteristic of birds | - |
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| bacchanalian | (adjective) used of riotously drunken merrymaking | Synonyms: bacchanal, bacchic, carousing, orgiastic |
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| banian | (noun) a loose fitting jacket; originally worn in India | Synonyms: banyan |
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| (noun) East Indian tree that puts out aerial shoots that grow down into the soil forming additional trunks | Synonyms: banian tree, banyan, banyan tree, East Indian fig tree, Ficus bengalensis, Indian banyan |
| barbarian | (adjective) without civilizing influences | Synonyms: barbaric, savage, uncivilised, uncivilized, wild |
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| (noun) a member of an uncivilized people | Synonyms: savage |
| (noun) a crude uncouth ill-bred person lacking culture or refinement | Synonyms: boor, churl, Goth, peasant, tike, tyke |
| batrachian | (adjective) relating to frogs and toads | Synonyms: anuran, salientian |
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| (noun) any of various tailless stout-bodied amphibians with long hind limbs for leaping; semiaquatic and terrestrial species | Synonyms: anuran, frog, salientian, toad, toad frog |
| beautician | (noun) someone who works in a beauty parlor | Synonyms: cosmetician |
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| bohemian | (adjective) unconventional in especially appearance and behavior | - |
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| (noun) a nonconformist writer or artist who lives an unconventional life | - |
| caecilian | (adjective) of or relating to or belonging to the family Caeciliidae | - |
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| (noun) any of the small slender limbless burrowing wormlike amphibians of the order Gymnophiona; inhabit moist soil in tropical regions | Synonyms: blindworm |
| caesarian | (adjective) relating to abdominal delivery | Synonyms: caesarean, cesarean, cesarian |
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| (noun) the delivery of a fetus by surgical incision through the abdominal wall and uterus (from the belief that Julius Caesar was born that way) | Synonyms: abdominal delivery, C-section, caesarean, caesarean delivery, caesarean section, caesarian delivery, caesarian section, cesarean, cesarean delivery, cesarean section, cesarian, cesarian section |
| callipygian | (adjective) pertaining to or having finely developed buttocks | Synonyms: callipygous |
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| callithumpian | (adjective) of or relating to a callithump | - |
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| carnelian | (noun) a translucent red or orange variety of chalcedony | Synonyms: cornelian |
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| catapultian | (adjective) of or like a catapult | Synonyms: catapultic |
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| catarrhinian | (adjective) of or related to Old World monkeys that have nostrils together and opening downward | Synonyms: catarrhine |
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| centenarian | (adjective) being at least 100 years old | - |
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| (noun) someone who is at least 100 years old | - |
| ceratopsian | (noun) any of several four-footed herbivorous dinosaurs with enormous beaked skulls; of the late Cretaceous in North America and Mongolia | Synonyms: horned dinosaur |
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| cesarian | (adjective) relating to abdominal delivery | Synonyms: caesarean, caesarian, cesarean |
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| (noun) the delivery of a fetus by surgical incision through the abdominal wall and uterus (from the belief that Julius Caesar was born that way) | Synonyms: abdominal delivery, C-section, caesarean, caesarean delivery, caesarean section, caesarian, caesarian delivery, caesarian section, cesarean, cesarean delivery, cesarean section, cesarian section |
| chelonian | (adjective) of or relating to or resembling or being a turtle or tortoise | - |
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| (noun) a reptile of the order Chelonia | Synonyms: chelonian reptile |
| chondrichthian | (noun) fishes in which the skeleton may be calcified but not ossified | Synonyms: cartilaginous fish |
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| christian | (adjective) following the teachings or manifesting the qualities or spirit of Jesus Christ | - |
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| chthonian | (adjective) dwelling beneath the surface of the earth | Synonyms: chthonic, nether |
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| circadian | (adjective) of or relating to biological processes occurring at 24-hour intervals | - |
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| civilian | (adjective) associated with civil life or performed by persons who are not active members of the military | - |
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| (noun) a nonmilitary citizen | - |
| clinician | (noun) a practitioner (of medicine or psychology) who does clinical work instead of laboratory experiments | - |
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| cnidarian | (noun) radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures; they occur in polyp and medusa forms | Synonyms: coelenterate |
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| collegian | (noun) a student (or former student) at a college or university | Synonyms: college boy, college man |
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| comedian | (noun) a professional performer who tells jokes and performs comical acts | Synonyms: comic |
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| (noun) an actor in a comedy | - |
| contrarian | (noun) an investor who deliberately decides to go against the prevailing wisdom of other investors | - |
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| corinthian | (adjective) of or relating to or characteristic of Corinth or its inhabitants | - |
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| (adjective) of or pertaining to the Corinthian style of architecture | - |
| cornelian | (noun) a translucent red or orange variety of chalcedony | Synonyms: carnelian |
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| cosmetician | (noun) someone who sells or applies cosmetics | - |
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| (noun) someone who works in a beauty parlor | Synonyms: beautician |
| crocodilian | (noun) extant archosaurian reptile | Synonyms: crocodilian reptile |
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| crossopterygian | (noun) any fish of the order Crossopterygii; most known only in fossil form | Synonyms: lobe-finned fish, lobefin |
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| custodian | (noun) one having charge of buildings or grounds or animals | Synonyms: keeper, steward |
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| cyprian | (adjective) resembling the ancient orgiastic worship of Aphrodite on Cyprus | - |
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| (noun) a woman who engages in sexual intercourse for money | Synonyms: bawd, cocotte, fancy woman, harlot, lady of pleasure, prostitute, sporting lady, tart, whore, woman of the street, working girl |
| dalmatian | (noun) a large breed having a smooth white coat with black or brown spots; originated in Dalmatia | Synonyms: carriage dog, coach dog |
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| diagnostician | (noun) a doctor who specializes in medical diagnosis | Synonyms: pathologist |
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| dialectician | (noun) a logician skilled in dialectic | - |
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| dietician | (noun) a specialist in the study of diet and nutrition | Synonyms: dietitian |
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| dietitian | (noun) a specialist in the study of diet and nutrition | Synonyms: dietician |
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| diluvian | (adjective) of or connected with a deluge | Synonyms: diluvial |
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| dioecian | (adjective) having male and female reproductive organs in separate plants or animals | Synonyms: dioecious |
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| disciplinarian | (noun) someone who demands exact conformity to rules and forms | Synonyms: martinet, moralist |
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| durian | (noun) huge fruit native to southeastern Asia `smelling like Hell and tasting like Heaven'; seeds are roasted and eaten like nuts | - |
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| (noun) tree of southeastern Asia having edible oval fruit with a hard spiny rind | Synonyms: durian tree, Durio zibethinus, durion |
| dystopian | (adjective) as bad as can be; characterized by human misery | - |
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| (adjective) of or pertaining to or resembling a dystopia | - |
| econometrician | (noun) an economist who uses statistical and mathematical methods | Synonyms: econometrist |
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| egalitarian | (adjective) favoring social equality | Synonyms: classless |
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| (noun) a person who believes in the equality of all people | Synonyms: equalitarian |
| electrician | (noun) a person who installs or repairs electrical or telephone lines | Synonyms: lineman, linesman |
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| elysian | (adjective) relating to the Elysian Fields | - |
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| (adjective) being of such surpassing excellence as to suggest inspiration by the gods | Synonyms: divine, inspired |
| eonian | (adjective) of or relating to a geological eon (longer than an era) | Synonyms: aeonian |
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| (adjective) continuing forever or indefinitely | Synonyms: aeonian, ageless, eternal, everlasting, perpetual, unceasing, unending |
| equalitarian | (noun) a person who believes in the equality of all people | Synonyms: egalitarian |
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| equestrian | (adjective) of or relating to or featuring horseback riding | - |
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| (adjective) of or relating to or composed of knights | - |
| (noun) a person skilled in equitation | Synonyms: horseback rider |
| esthetician | (noun) a philosopher who specializes in the nature of beauty | Synonyms: aesthetician |
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| (noun) a worker skilled in giving beauty treatments (manicures and facials etc.) | Synonyms: aesthetician |
| ethician | (noun) a philosopher who specializes in ethics | Synonyms: ethicist |
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| euclidian | (adjective) relating to geometry as developed by Euclid | Synonyms: euclidean |
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| eutherian | (adjective) of or relating to or belonging to the subclass Eutheria | - |
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| (noun) mammals having a placenta; all mammals except monotremes and marsupials | Synonyms: eutherian mammal, placental, placental mammal |
| fabian | (adjective) using cautious slow strategy to wear down opposition; avoiding direct confrontation | - |
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| fustian | (noun) a strong cotton and linen fabric with a slight nap | - |
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| (noun) pompous or pretentious talk or writing | Synonyms: blah, bombast, claptrap, rant |
| gentian | (noun) any of various plants of the family Gentianaceae especially the genera Gentiana and Gentianella and Gentianopsis | - |
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| geometrician | (noun) a mathematician specializing in geometry | Synonyms: geometer |
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| geriatrician | (noun) a specialist in gerontology | Synonyms: gerontologist |
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| gorgonian | (noun) corals having a horny or calcareous branching skeleton | Synonyms: gorgonian coral |
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| grammarian | (noun) a linguist who specializes in the study of grammar and syntax | Synonyms: syntactician |
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| guardian | (noun) a person who cares for persons or property | Synonyms: defender, protector, shielder |
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| haemosporidian | (noun) minute protozoans parasitic at some stage of the life cycle in blood cells of vertebrates including many pathogens | - |
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| haplosporidian | (noun) parasite in invertebrates and lower vertebrates of no known economic importance | - |
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| hessian | (noun) (19th century) a man's high tasseled boot | Synonyms: Hessian boot, jackboot, Wellington, Wellington boot |
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| historian | (noun) a person who is an authority on history and who studies it and writes about it | Synonyms: historiographer |
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| holocephalian | (noun) fish with high compressed head and a body tapering off into a long tail | Synonyms: holocephalan |
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| holothurian | (noun) echinoderm having a flexible sausage-shaped body, tentacles surrounding the mouth and tube feet; free-living mud feeders | Synonyms: sea cucumber |
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| hominian | (adjective) characterizing the family Hominidae, which includes Homo sapiens as well as extinct species of manlike creatures | Synonyms: hominid |
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| humanitarian | (adjective) of or relating to or characteristic of humanitarianism | - |
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| (adjective) marked by humanistic values and devotion to human welfare | Synonyms: human-centered, human-centred, humanist, humanistic |
| (noun) someone devoted to the promotion of human welfare and to social reforms | Synonyms: do-gooder, improver |
| (noun) an advocate of the principles of humanism; someone concerned with the interests and welfare of humans | Synonyms: humanist |