Here's what rhymes with annihilationism.
euphemism isolationism racialism sophism prism pessimism schism paganism animism chauvinism hedonism holism shamanism isomerism chrism creationism mechanism organism socialism feminism heroism optimism cynicism dualism dynamism humanism modernism rationalism rheumatism unionism egoism egotism fatalism nihilism anarchism aphorism exorcism favoritism heathenism legalism mannerism revisionism stoicism abolitionism albinism archaism favouritism synergism solecism tokenism tropism communism nationalism antagonism despotism journalism liberalism pluralism symbolism terrorism embolism fanaticism federalism feudalism formalism anachronism catechism classicism eroticism pacifism regionalism separatism aneurism commercialism elitism fetishism hypnotism lyricism nepotism ostracism pauperism plagiarism voluntarism automatism cretinism ecumenism impressionism mesmerism perfectionism revivalism solipsism agrarianism futurism galvanism hooliganism mongolism philistinism purism specialism criticism metabolism patriotism alcoholism colonialism conservatism mysticism activism altruism barbarism determinism magnetism naturalism positivism pragmatism radicalism relativism scepticism absolutism consumerism dogmatism evangelism militarism narcissism paternalism protectionism secularism behaviorism centralism corporatism emotionalism factionalism functionalism microorganism monasticism parasitism populism recidivism scholasticism botulism exhibitionism expressionism neutralism parochialism proselytism puritanism sectionalism witticism capitalism imperialism materialism skepticism empiricism parallelism professionalism romanticism cannibalism collectivism internationalism postmodernism republicanism agnosticism astigmatism eclecticism expansionism mercantilism provincialism sectarianism sensationalism traditionalism clericalism exoticism gradualism interventionism negativism syndicalism authoritarianism bilingualism fundamentalism hyperthyroidism hypothyroidism industrialism antisemitism anticommunism evangelicalism individualism cosmopolitanism egalitarianism intellectualism sentimentalism somnambulism totalitarianism utilitarianism constitutionalism environmentalism existentialism humanitarianism transcendentalism electromagnetism Words that almost rhyme with annihilationism
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 paroxysm precondition cataclysm manumission rhetorician academician prevision competition composition extradition inquisition presupposition superposition disquisition electrician obstetrician statistician imprecision decomposition malnutrition predisposition transposition indisposition interposition pediatrician superimposition diagnostician juxtaposition wisdom serum theorem cecum gingham system kingdom victim dictum gypsum fearsome winsome symptom pilgrim ecosystem