Here's what rhymes with custuma.
puma summa satsuma Words that almost rhyme with custuma
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 manoeuvre barracuda hallelujah incunabula outmanoeuvre