Words that almost rhyme with perpessum

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

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