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