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