Here's what rhymes with congression.
session aggression compression cession impression accession concession confession oppression regression recession digression expression depression possession profession discretion succession procession progression repression suppression obsession secession transgression decompression intercession indiscretion retrogression dispossession Words that almost rhyme with congression
lesson lessen resin leaven seven heaven eleven lemon reckon leaden section collection election mention tension correction weapon pension threaten erection freshman lengthen melon felon heron question attention direction connection conception exception selection affection chairman convention reception rejection brethren connexion contention retention complexion resection tendon convection ejection inflection ascension dentin headman pepsin declension headmen pectin protection extension infection perception reflection detection dimension injection inspection invention objection perfection prevention rebellion projection recollection redemption resurrection strengthen congestion deception deflection detention dissection exemption inception insurrection defection dissension dejection pretension reelection henchmen indirection preemption redirection reflexion sexton intention suggestion apprehension comprehension intersection intestine suspension digestion subjection contraception imperfection ingestion condescension distension inattention abstention circumspection interception intervention hypertension introspection misconception predilection contravention disaffection distention indigestion interconnection disconnection watermelon disinfection misapprehension