Here's what rhymes with monolingual.
lingual bilingual sublingual Words that almost rhyme with monolingual
single mingle shingle jingle tingle wrinkle wriggle dingle little signal riddle ripple giggle lintel tinkle wiggle riffle commingle crinkle jiggle surcingle winkle niggle middle simple civil official symbol crystal fiscal cheerful distal fearful nickel brittle dismal missile pistol sinful triple whistle chisel fiddle nipple pixel sickle unofficial wilful blissful cripple fickle fitful kindle nimble sprinkle tearful trickle twinkle vigil virile willful wishful wistful abysmal bristle chiral drizzle multilingual nibble pickle thimble thistle tickle tinsel tittle cymbal dimple dribble fissile griddle intermingle missal pistil shrivel sisal brimful diddle drivel fistful gristle hymnal pimple prickle sibyl sizzle tipple whittle brindle chicle fizzle mistral wimple dibble grizzle kibble miscall piffle dirndl frizzle piddle brimfull initial familial spindle epistle skillful acquittal minstrel belittle committal dwindle liminal quibble scribble swindle swivel noncommittal rekindle spittle uncivil nonofficial periwinkle stipple bellyful nonjudicial sniffle timbrel twiddle schnitzel skittle squiggle skiffle skinful artificial beneficial judicial provincial ventricle baptismal gingival pedicle unskillful antimissile megacycle oversimple pumpernickel basinful cataclysmal superficial dismissal interstitial sacrificial vendible participle prejudicial paroxysmal transmittal semiofficial nonprejudicial extrajudicial