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