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