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