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