Here's what rhymes with costuma.
puma summa satsuma Words that almost rhyme with costuma
tuna duenna lacuna vicuna stupa tua tuba chukka doodah ua hua pupa hula scuba pukka supra fistula sutra helluva bazooka beluga louvre macula scrofula appaloosa barracuda hallelujah manoeuvre incunabula outmanoeuvre