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