Words That Rhyme With "Interregnum" :

2 syllables:

deckman, Degen, eggen, Ekman, headman, Heckman, Kennan, Lennon, magnum, Meghan, peckman, pennon, phenom, plenum, speckman, sphagnum, steadman, tegmen, tenon, vegan, venom

3 syllables: