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