Here's what rhymes with gestaltism.
prism barbarism despotism terrorism schism elitism stoicism albinism archaism chrism tropism organism heroism optimism pluralism altruism dualism rheumatism dogmatism egoism egotism separatism aphorism holism hypnotism pauperism plagiarism populism botulism favouritism solipsism synergism futurism purism sophism tokenism criticism communism patriotism socialism feminism journalism liberalism mysticism activism cynicism dynamism embolism empiricism federalism feudalism formalism modernism pessimism positivism scepticism absolutism catechism eroticism fatalism militarism narcissism nihilism pacifism paganism anarchism aneurism animism behaviorism chauvinism corporatism euphemism favoritism fetishism heathenism hedonism legalism lyricism mannerism nepotism ostracism parasitism shamanism automatism cretinism proselytism puritanism racialism witticism bimetallism monetarism solecism specialism mechanism skepticism symbolism fanaticism humanism magnetism naturalism parallelism pragmatism radicalism relativism unionism classicism hyperthyroidism hypothyroidism postmodernism regionalism secularism astigmatism centralism exorcism recidivism voluntarism exoticism isomerism mesmerism neutralism parochialism adventurism anabolism charlatanism dilettantism capitalism metabolism imperialism nationalism alcoholism antagonism conservatism materialism determinism rationalism romanticism anachronism cannibalism collectivism evangelism paternalism agnosticism antisemitism eclecticism revisionism scholasticism sectarianism abolitionism ecumenism exhibitionism gradualism negativism perfectionism revivalism sectionalism syndicalism colonialism individualism professionalism bilingualism consumerism industrialism protectionism commercialism cosmopolitanism emotionalism existentialism expansionism factionalism isolationism mercantilism monasticism provincialism traditionalism anticommunism clericalism expressionism impressionism interventionism authoritarianism fundamentalism republicanism totalitarianism utilitarianism functionalism intellectualism microorganism sensationalism sentimentalism evangelicalism somnambulism internationalism egalitarianism transcendentalism environmentalism humanitarianism electromagnetism constitutionalism Words that almost rhyme with gestaltism
prison rhythm arisen partition risen mizzen given addition vision driven edition listen mission politician derision fission audition logician riven stiffen position decision division tradition permission admission algorithm ambition petition emission prohibition revision omission remission tuition apparition attrition erudition fruition magician sedition dentition imprison logarithm rendition striven rhetorician dietitian glisten rescission tactician condition opposition commission physician provision television disposition expedition precision repetition suspicion abolition coalition cognition collision incision intuition nutrition submission superstition clinician excision forgiven ignition musician technician volition apposition envision extradition paroxysm patrician theoretician ebullition munition prevision readmission definition competition composition transition proposition supervision ammunition deposition exhibition exposition inhibition imposition subdivision supposition admonition demolition preposition contrition indecision intermission cataclysm electrician statistician imprecision recognition transmission acquisition circumcision malnutrition mathematician requisition indisposition inquisition interposition precondition redefinition superposition disquisition manumission obstetrician pediatrician premonition academician diagnostician decomposition juxtaposition predisposition transposition presupposition superimposition wisdom serum theorem dictum gypsum cecum gingham system kingdom victim pilgrim fearsome winsome symptom ecosystem