Here's what rhymes with comparatism.
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addition edition prison rhythm arisen risen erudition audition mizzen given tradition vision driven listen mission television admission ambition petition politician attrition derision fission magician logician riven stiffen position condition decision definition division commission permission physician provision algorithm repetition suspicion collision deposition emission exhibition inhibition partition prohibition revision submission forgiven omission remission tuition apparition demolition sedition apposition dentition imprison logarithm patrician rendition striven rhetorician dietitian glisten readmission rescission tactician opposition competition transition disposition expedition precision abolition ammunition coalition cognition incision intuition nutrition clinician excision ignition imposition musician supposition fruition technician volition contrition envision extradition intermission paroxysm premonition theoretician ebullition imprecision munition prevision composition recognition transmission acquisition proposition supervision exposition superstition subdivision admonition mathematician preposition requisition indecision inquisition interposition precondition redefinition cataclysm electrician obstetrician pediatrician statistician academician decomposition circumcision malnutrition transposition indisposition presupposition superposition disquisition manumission juxtaposition diagnostician predisposition superimposition wisdom serum theorem dictum gypsum cecum gingham system kingdom victim pilgrim fearsome winsome symptom ecosystem