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