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