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