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