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