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