Cetacean rhymes with:
incapacitation, resuscitation, solicitation, cogitation, decapitation, gravitation, incapacitation, interpretation, invitation, irritation, levitation, limitation, precipitation, resuscitation, solicitation
Cetacean sounds like:
cadogan, castagna, castagno, catchacan, catechism, chautauquan, citizen, costigan, cotugno, cutchin, cutugno, cytogen