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