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