Monolingual rhymes with:
bilingual, bilingual, dingwall, bilingual, dingwall, bilingual, dingwall, multilingual, actual, aggarwal, agrawal, bilingual, casual, coequal, cromwell, dingwall, equal, heterosexual, homosexual, individual, multilingual, mutual, perceptual, semiannual, sendawal, sensual, sequel, spiritual, textual, tidwell, tranquil, unequal, unusual, usual, visual