Here's what rhymes with extinetion.
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seven heaven eleven lesson lessen resin leaven mention dimension melon section election infection tension detection injection invention weapon pension deception detention erection inception lemon reckon defection dissension ejection dejection leaden felon heron attention direction connection exception intention perception affection chairman correction inspection perfection reception rejection connexion intestine threaten deflection dissection insurrection resection tendon freshman inflection ingestion ascension dentin distension headman lengthen pepsin headmen indirection pectin question collection protection conception extension selection convention objection prevention rebellion apprehension brethren contention hypertension intersection projection redemption retention strengthen suspension complexion digestion exemption subjection convection imperfection disaffection disinfection distention inattention pretension reelection declension disconnection henchmen interception preemption sexton watermelon intervention reflection suggestion resurrection congestion condescension indigestion abstention redirection reflexion comprehension recollection contraception introspection misconception predilection interconnection circumspection contravention misapprehension