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