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abecedariumA book used to teach the alphabet; alphabet book; primer.abnormalismSynonym of abnormality.abortionismThe advocacy or practice of abortion.absenteeismThe state of being absent, especially frequently or without good reason; the practice of an absentee.academicism(art, literature) Traditional or orthodox formalism; conventionalism.acarinariumA region on the body of wasps and some similar insects that carries mitesacetylonium(organic chemistry, especially in combination) The cation CH₃C=O⁺ derived from the acetyl radicalachromatism(optics) The state or quality of being achromatic; achromaticity.aciculiformNeedle-shaped; acicular.acinaciform(botany) Shaped like a scimitar.acinetiform(zoology) Resembling the Acinetae.acousmonium(music) A large loudspeaker orchestra used for electroacoustic music performances.acquirendumThat which is to be acquired, for example by a learner.acrocliniumAny Australian plant of the former genus Acroclinium (now included in genus Rhodanthe)acrodontismThe condition of being acrodontacrosticismAcrostic arrangement or character.acrotarsium(zoology) The instep of the foot (front of the tarsus)actionalism(sociology) Describes the theory of sociologist Alain Touraine that aims to replace sociology's focus from society to actors. Here, they emphasise the importance of individuals as agents of social systems, rather than passive observers.acylazolium(organic chemistry, especially in combination) Any acyl derivative of an azolium ionacyliminium(organic chemistry) Any acyl iminium ionadaptionismAlternative form of adaptationism.adiaphorismThe belief that certain religious doctrines or ceremonies are indifferent, i.e. do not matter.adjectivismThe excessive use of adjectives.adminiculum(medicine) That which gives support to a part.adoptianismAlternative form of adoptionism.adoptionism(Christianity) A form of Christianity which maintains that Jesus is divine only in the sense that God the Father adopted him, either at Jesus' birth, or at his death, as opposed to the orthodox understanding of the nature of the Trinity.adventurism(politics) Political strategy focusing on individual actions such as assassinating political enemies.aeronautismThe practice of aeronautic travel.aerotropism(biology) The growth of an organism either towards, or away from a region of higher oxygen content.agariciformHaving the form of an agaricagenitalismThe absence or incomplete development of sex organs.agnosticismThe view that the existence of God or of all deities is unknown, unknowable, unproven, or unprovable.agrammatism(uncountable) The inability to form sentences by virtue of a brain disorder.agrarianismA social and political philosophy that advocates an equitable distribution of land.agritourismA form of tourism in which tourists stay in farms or agricultural villages, either to experience farm life, or as a base for exploring the countrysideagrotourismAlternative form of agritourism.albinoidismThe condition of being albinoid.allargentum(mineralogy) A hexagonal-dihexagonal dipyramidal silver gray mineral containing antimony and silver.allodialismThe allodial system.alloerotismSynonym of alloeroticism.allosterismSynonym of allostery.allotropism(chemistry) The ability (of an element) to exist in more than one physical form without change of state.alphabetism(countable) An initialism: an abbreviation which is read letter by letter, such as UN.alteregoism(psychology, philosophy) Altruism as a result of the identification of others with oneself.aluminiform(obsolete) Having the form of alumina.alveoliform(archaic) Having the form of alveoli, or little sockets, cells, or cavities.ametabolismThe condition of being ametabolicamoeboidismAlternative form of ameboidism.amorphinismwithdrawal symptoms from morphineamphoterism(chemistry) The property of being amphoteric.ampilliformMisspelling of ampulliform.ampiroxicam(pharmacology) A nonsteroidal anti-inflammatory drug, a prodrug of piroxicam.amplexiformHaving the form of a claspampulliformHaving the shape of a flask.anachronismA chronological mistake; the erroneous dating of an event, circumstance, or object. [from 17th c.]analetheism(philosophy) The idea that propositions can be neither true nor false, that is that they can lack truth value, the opposite of the law of excluded middle.analysandum(philosophy) Something to be analyzed.anamorphism(functional programming) A generalization of the list-producing unfolds known from functional programming to arbitrary abstract data types that can be described as final coalgebras.ancestorismThe emphasis of the importance of one's foremothers, forefathers or lineage: their veneration (in a nonreligious sense).anchoretismThe practice or mode of life of an anchorite; hermithoodanchoritismThe practices of an anchorite.androconiumA specialised, glandular scale, on the forewings of some butterflies, that emits pheromonesandrogenismThe presence of androgens in the bodyandrogynismhermaphroditismandrophorum(botany) A stalk-like extension of the center of a flower from which the stamens emerge.andropodium(anatomy) A modified anal fin of certain types of livebearing fish that can be used for reproductionanerythrism(zoology) Absence of red pigment; applied to certain snakes.anguiliformMisspelling of anguilliform.animalculumSynonym of animalcule.anisomerismThe quality of being anisomeric.annexionismannexationismanorchidismSynonym of anorchism.antenniformHaving the shape of an antennaantennogramA record of the electrical activity of an insect's antenna in the presence of an odour (particularly a pheromone)antependium(ecclesiastical) The hangings or screen in front of the altar; an altar cloth; the frontal.antheridium(botany, mycology) An organ producing male gametes called antherozoids, found in some algae, ferns, and bryophytes.antheriform(archaic, botany) Shaped like an anther.anthocodiumThe upper part of the polyp in some corals.anthroponymThe name of a person, especially a surname.antiarabismAlternative form of anti-Arabism.antiatheismOpposing atheism.antibaptismOpposing baptism.antibiofilm(microbiology) Acting against biofilms.antibiogram(medicine) A table reporting a bacterial isolate’s susceptibility to different antibiotics.anticardium(anatomy) The epigastrium, especially the part almost in front of the heart.anticultismOpposition to cults.antidualismRejection of dualism.antielitism(sociology) Opposition to elitism.antifascismOpposition to fascismantifideism(philosophy) opposition to fideism.antifirearmOpposing firearms.antifreedomOpposing or working against freedom.antiheroism(literature) The quality of being an antiheroantijudaismAlternative form of anti-Judaism.antilithium(particle physics, science fiction) The antiatom form of lithium.antimarxism(politics) Opposed to the tenets of Marxism.antimaximum(mathematics) A maximum that has changed sign, caused by certain values of parameters.antimensiumAlternative form of antimins.antimuonium(particle physics) The antimatter form of muoniumantiprogramA set of actions that is counter to those of another's programantiquarismSynonym of antiquarianism.antiquariumA place for keeping antiques.antirealism(philosophy) Any position involving denial of the objective reality of certain entities, or denial that certain general statements are objectively either true or false.antirentism(US, historical) The beliefs of the antirenters.antirrhinumAny plant of the genus Antirrhinum of snapdragons.antislavismAntislavic sentiment, in general: negative attitude towards Slavic peoples.antispecismAlternative form of antispeciesism.antistatism(politics) Opposition to state intervention into personal, social or economic affairs.antitheorem(logic) A syntactically correct expression whose negation is a theorem.antitourism(politics) Opposing tourism.antitritium(particle physics) The antimatter equivalent of tritium.antiwhitismSynonym of antiwhiteness (“hostility towards white people”).antizionismAlternative letter-case form of anti-Zionism.anythingism(rare) A nonspecific belief in anything, or that anything goes.apicoseptumAn apical septumapnosticismSynonym of apatheism.apodyterium(architecture, historical) The apartment at the entrance of the baths, or in the palestra, for getting undressed.apoliticism(politics) Apolitical behaviour.apomorphism(mathematics) The dual of a paramorphismaposematism(biology, chiefly zoology) An adaptation, especially a form of coloration, that warns off potential predators.apotropaism(religion, mysticism) The use of ritual or other magical means (including charms and/or incantations) to avert evil or bad luck.apragmatismA state of inactivity caused by schizophrenia or severe depressionaquatourism(rare) Tourism for the purpose of water-based activities such as sailing and diving.arachnidismThe condition of being poisoned as a result of a spider's bite.arachnidium(zoology, dated) The collective abdominal appendages from which a spider produces a web or silk.aramaeogramAlternative spelling of Arameogram.arborealismThe condition of being arborealarcadianismAn ideal rustic or pastoral state.archdukedomThe territory or dignity of an archduke or archduchess; an archduchy.archegonium(botany) A multicellular reproductive structure that contains a large, non-motile gamete (egg cell), and within which an embryo will develop.archivalismThe keeping of archives.arcopallium(ornithology) A region in the brains of birds that has functions in learningarenocenium(organic chemistry, especially in combination) Any aromatic derivative of a ferrocene ion or radicalargentalium(archaic) An alloy of aluminium and silver.argentariumRoman alloy of lead and tin for tinningarithmogramThe number obtained by summing the numerical values of the letters of a word.armilustrum(Ancient Rome) A festival, in Ancient Rome, in honour of Mars, the god of war.aromatogramA test for the antibacterial activity of essential oils, especially those used in aromatherapyarseholedom(Commonwealth, mildly vulgar) Alternative form of assholedom.arteriogramAn X-ray of an artery after injection with a radiopaque materialaryllithium(organic chemistry) Any aryl organolithium compoundasbestiform(crystallography) Having a particular kind of fibrosity in which fibers have high tensile strength and flexibilityascidiarium(zoology) The structure that unites the ascidiozooids in a compound ascidian.aspergillum(Christianity) An implement, in the form of a brush or of a rod with a perforated container, for sprinkling holy water; a holy-water sprinkle.aspermatismSynonym of aspermia.aspersoriumA basin that holds holy water with which worshippers sprinkle themselves.aspheterism(dated, rare) The view that all property should be in common ownership and that no individual should benefit from private possession.assassinismThe actions of an assassin.associanismAn adaptation of Fourierism to a democratic capitalist economy.associatismA self-regulatory movement in the 1920s in which community members assumed a duty of mutual obligation to support each other.astigmatism(optics) A defect of a lens such that light rays coming from a point do not meet at a focal point so that the image is blurred.asynclitismThe position of a baby in the uterus such that the head is presenting first, tilted to the shoulder and thus no longer in line with the birth canal.athleticismThe state of being an athlete, or of taking part in athletic events.athyroidism(pathology) The congenital absence of a thyroid gland or a suppression of its function.attorneydomThe realm or sphere of attorneys.attorneyismThe practice, peculiarities or doctrines of attorneys.aurichalcumAlternative form of orichalcum.autistiform(medicine) Resembling autism.autoantonym(rare) A word that has two opposing meanings.autoconfirmTo automatically confirm.autocratismIdeology that supports autocracy; autocracy.autoerotismSexual activity involving oneself, including masturbation.autohyponymA word that is a hyponym of itself, displaying vertical polysemy via a stricter subsense whose denotation is entirely a subset of a broader sense.autostylismSynonym of autostyly.autotropismThe tendency of plant organs to grow in a straight line unless influenced by external stimuli.avicularium(biology) A modified zooid, in some colonial bryozoans, in the form of a beak, that prevents other organisms from settling on the colonyaziridinium(organic chemistry) Any cation formed by protonation of an aziridine