Here's what rhymes with cryptophycean.
bison Words that almost rhyme with cryptophycean
hyphen siphon syphon horizon atheism liven thriven bedizen enliven heighten siren scion hymen lion fibrin frighten tighten widen fireman firemen lichen lighten ripen beiden liken whiten titan finespun brighten baryon prion lineman linemen pinyon linesman billycan funnyman enlighten aphelion cotyledon veniremen dandelion dicotyledon perihelion monocotyledon