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