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