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