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