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