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