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