Words and phrases that rhyme with volcanism:  (683 results)
2 syllables:
ism, pisum, prism, schism
4 syllables:
acosmism, actinism, activism, agonism, albinism, algorism, alpinism, altruism, aneurism, anglicism, animism, aphorism, asterism, atheism, atomism, atticism, barbarism, behmenism, benthamism, biblicism, boehmenism, bolshevism, botulism, brahmanism, brahminism, briticism, britishism, brutalism, cabalism, caesarism, caffeinism, calvinism, castroism, catechism, centralism, chauvinism, chromatism, cinchonism, classicism, communism, cretinism, criticism, cronyism, cynicism, dadaism, daltonism, dandyism, darwinism, deaf-mutism, despotism, dicrotism, docetism, dogmatism, donatism, druidism, dualism, dynamism, dysphemism, egoism, egotism, elitism, embolism, ergotism, erotism, erythrism, escapism, eunuchism, euphemism, euphuism, exorcism, extremism, familism, fatalism, federalism, feminism, fetichism, fetishism, feudalism, formalism, futurism, galenism, gallicism, galvanism, gargoylism, germanism, globalism, gnosticism, gothicism, grundyism, heathenism, hebraism, hedonism, hellenism, helotism, herbalism, heroism, hinduism, hirsutism, hitlerism, hoydenism, humanism, hybridism, hypnotism, imagism, irishism, jansenism, journalism, judaism, laconism, lamaism, lambdacism, lathyrism, latinism, legalism, leninism, liberalism, localism, locoism, logicism, lyricism, magnetism, mannerism, marcionism, mazdaism, mechanism, meliorism, mendelism, mentalism, mesmerism, methodism, mithraicism, mithraism, modernism, monachism, moralism, morphinism, muslimism, mysticism, narcissism, nativism, naturalism, naturism, nephalism, nepotism, neutralism, nicol prism, nihilism, nomadism, obiism, onanism, optimism, organism, ostracism, pacifism, paganism, panpsychism, passivism, pauperism, pessimism, phallicism, plagiarism, platonism, pluralism, pointillism, populism, pragmatism, prochronism, ptyalism, puseyism, pyrrhonism, quackerism, quakerism, quietism, racialism, rheumatism, rhotacism, rigorism, rochon prism, romanism, rowdyism, royalism, ruralism, satanism, saturnism, scepticism, schematism, scientism, sciolism, scotticism, semitism, sinapism, skepticism, socialism, solecism, southernism, specialism, spiritism, spoonerism, stalinism, stigmatism, stoicism, syllogism, symbolism, synchronism, syncretism, synergism, teratism, terrorism, tokenism, toryism, totalism, totemism, transvestism, traumatism, tribadism, trotskyism, ultraism, unionism, vaishnavism, vaisnavism, verbalism, virilism, vishnuism, vitalism, voodooism, vulcanism, vulgarism, wahhabism, wellerism, witticism, zionism
5 syllables:
absolutism, abstractionism, acephalism, achromatism, adactylism, adoptionism, adventurism, aestheticism, africanism, agnosticism, air embolism, alcoholism, alienism, allomerism, allotropism, amensalism, amoralism, anabaptism, anachronism, anatocism, anglicanism, animalism, animatism, anomalism, anorchidism, antagonism, archaicism, arianism, asceticism, astigmatism, asynchronism, asynclitism, atonalism, automatism, autotelism, behaviorism, behaviourism, bilingualism, biologism, bipedalism, bureaucratism, cannibalism, capitalism, cartesianism, catabolism, catastrophism, catholicism, charlatanism, chemotropism, clericalism, collectivism, commensalism, commercialism, communalism, conceptualism, confucianism, conservatism, constructivism, consumerism, corporatism, creationism, criminalism, cryptorchidism, determinism, diabolism, diastrophism, dichromatism, didacticism, dilettantism, eclecticism, ecotourism, empiricism, endaemonism, epicurism, erastianism, erecting prism, ergotropism, eroticism, essentialism, eudaemonism, eudemonism, euhemerism, evangelism, exoticism, expansionism, expressionism, externalism, fabianism, fanaticism, favoritism, favouritism, functionalism, gallicanism, gear mechanism, geotropism, gradualism, guild socialism, hermaphrodism, historicism, hooliganism, hydrotropism, hypericism, hypocorism, illuminism, illusionism, impressionism, infantilism, initialism, insularism, invalidism, iotacism, isomerism, italianism, jacobinism, jesuitism, kantianism, katabolism, keynesianism, laconicism, libertinism, lutheranism, malapropism, male chauvinism, medievalism, mendelianism, mennonitism, mercantilism, metabolism, metachronism, metamerism, meteorism, militarism, minimalism, moderatism, monasticism, monetarism, monogenism, monorchidism, mosaicism, mutualism, nationalism, necrophilism, negativism, neologism, neuroticism, neurotropism, new criticism, noctambulism, nominalism, objectivism, obscurantism, obstructionism, officialism, opportunism, optical prism, organicism, parachronism, parallelism, paralogism, parkinsonism, pastoralism, paternalism, patriotism, perfectionism, personalism, pharisaism, philistinism, phototropism, physicalism, pleochroism, polymerism, popularism, positivism, postmodernism, prescriptivism, primitivism, proselytism, protectionism, protestantism, provincialism, puritanism, radicalism, rationalism, reactionism, recidivism, reductionism, regionalism, relativism, religionism, revisionism, ritualism, romanticism, ruffianism, scholasticism, secessionism, sectionalism, secularism, self-criticism, sensualism, separatism, serialism, somnambulism, sovietism, state socialism, subjectivism, surrealism, syndactylism, syndicalism, systematism, tautomerism, teetotalism, theanthropism, thermotropism, thigmotropism, traducianism, transvestitism, trichromatism, trophotropism, voluntarism, wesleyanism, with cynicism
6 syllables:
able-bodiedism, abolitionism, academicism, accidentalism, aeroembolism, agrarianism, aldosteronism, americanism, anti-semitism, antifeminism, arminianism, athanasianism, autoerotism, biomagnetism, bioterrorism, bohemianism, clinocephalism, colloquialism, colonialism, confessionalism, consequentialism, conventionalism, counterterrorism, deconstructionism, defence mechanism, defense mechanism, desert rheumatism, deviationism, diamagnetism, ecoterrorism, ecumenicism, emotionalism, equestrianism, escape mechanism, esotericism, evolutionism, exhibitionism, existentialism, ferrimagnetism, ferromagnetism, firing mechanism, fundamentalism, geomagnetism, hegelianism, heliotropism, higher criticism, hyperthyroidism, hypogonadism, hypothyroidism, imperialism, industrialism, infantile autism, instrumentalism, interventionism, intuitionism, isolationism, lower criticism, malthusianism, materialism, metachromatism, metasomatism, meteortropism, microorganism, mohammadanism, mohammedanism, mongolianism, monochromatism, monometallism, monophysitism, muhammadanism, narcoterrorism, neo-darwinism, neoclassicism, neoplatonism, occasionalism, occidentalism, orientalism, originalism, paramagnetism, parochialism, particularism, pelagianism, pentecostalism, petty criticism, phenomenalism, photojournalism, polydactylism, polytonalism, professionalism, reform judaism, republicanism, rosicrucianism, sabellianism, sacerdotalism, sacramentalism, sectarianism, sensationalism, sentimentalism, servomechanism, socinianism, state capitalism, steering mechanism, thromboembolism, traditionalism, transcendentalism, transsexualism, triangular prism, ultramontanism, universalism, utopianism, vernacularism, voluntaryism, yellow journalism, zoroastrianism
Words and phrases that almost rhyme :  (2 results)
5 syllables:
egocentrism
6 syllables:
anthropocentrism
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