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