Here's what rhymes with hyponymous.
eponymous Words that almost rhyme with hyponymous
foaminess lonesomeness motionless copiousness wholesomeness loathsomeness soullessness dolefulness woefulness hopelessness socialists homelessness boastfulness emotionless ferociousness soulfulness atrociousness proteolysis chauvinists postmistress globalists precociousness toastmistress ufologists unwholesomeness