Here's what rhymes with contentum.
momentum Words that almost rhyme with contentum
dentin tendon intention indention inattention abstention hempen intervention referendum distention circumvention subvention contravention supervention nonintervention denim rectum septum venom plenum bedlam jetsam phenom spectrum welcome unwelcome harem addendum vellum velum plectrum webcam envenom seldom cerebellum antebellum antiserum flagellum interregnum bubblegum