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