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