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