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