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