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