Mombasa rhymes with:
basa, kielbasa, alcasa, asa, basa, benincasa, bokassa, bourassa, cahasa, casa, casassa, dasa, diasa, enasa, hiromasa, kielbasa, kinshasa, kolasa, lanasa, lassa, lhasa, masa, matassa, ossa, premadasa, rzasa, thalassa
Mombasa sounds like:
mabis, mabus, maffucci, mafia's, mafias, mahfouz, mahfouz's, mambas, manbeck, mapco, mapes, mapi's, maps, maves, mavis, mavs, mavs', mbeki, memphis, menapace, menopause, mimbs, minibus, minibuses, minpeco, mips, mob's, mobbs, mobius, mobs, moebius, moonves, moppes, mops, mopus, moves, movie's, movies, mpeg, mpg, muffs, mumps, myopic