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