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