Here's what rhymes with propylen.
sullen semicolon Words that almost rhyme with propylen
button dozen dudgeon toughen piton dubbin sudden cousin summon dungeon mutton repulsion sultan muslin propulsion fuckin yeomen bludgeon gulden muffin coven bunion mullion roughen nubbin biathlon kuchen production someone reduction junction drunken suction emulsion luncheon percussion sunken tungsten perdition revulsion avulsion globin irruption glutton gunman impulsion unbutton dustpan lumpen scullion scutcheon decagon dustman bellybutton function discussion corruption induction deduction compulsion eruption expulsion abduction seduction androgen shrunken exciton escutcheon repercussion gumption caparison stuntman grunion assumption destruction introduction reproduction combustion conduction presumption disruption injunction interruption resumption concussion convulsion disjunction transduction huntsman subduction liposuction ragamuffin instruction conjunction dysfunction obstruction compunction overproduction construction consumption malfunction reintroduction underproduction reconstruction deconstruction misconstruction