Poseidon rhymes with:
seiden, sidon, biden, briden, bryden, dryden, eiden, haydn, heiden, hyden, iden, jividen, leyden, liden, lyden, riden, ryden, seiden, sidon, widen
Poseidon sounds like:
paighton, pakistan, pakistani, pakistanian, pasadena, pastime, paustian, paxton, peacetime, pectin, pestana, picton, piston, pistone, position, postema, posten, postino, postma, postman, poston, postum, pseudonym