Keratin rhymes with:
sheraton, puritan, sheraton, benetton, biotin, charlatan, cosmopolitan, exoskeleton, gelatin, labaton, malleton, metropolitain, metropolitan, neapolitan, puritan, sheraton, skeleton, vanbenschoten
Keratin sounds like:
keratotomy, khartoum, kirton, koreatown, korten, kortman, kortum, kreitman, krudman