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