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