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