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