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