Words that almost rhyme with cephem

seven heaven session cession lesson lessen resin leaven freshen possession eleven accession obsession recession secession profession aggression succession concession confession oppression procession suppression expression depression impression discretion regression repression intercession digression compression progression dispossession concretion transgression indiscretion decompression retrogression

venom harem vellum velum seldom septum denim welcome emblem rectum addendum plenum bedlam spectrum cerebellum flagellum momentum referendum unwelcome antiserum antebellum interregnum