IOUsnounHow many syllables in IOUs?There are 2 syllables in the word IOUs.See more 2-syllable nounsHow to pronounce IOUs:Say IOUsDefinition of IOUs:IOUs (noun):a paper that has on it the letters iou, a stated sum, and a signature and that is given as an acknowledgment of debtOther 2-syllable words like IOUsHere are some other common words that have 2 syllables, like IOUs does.NevilleOwainpiratessubscribebee flygarnishKalebKristianLauriequaltaghscribblestreamingAlexenjoysMyanight-lightOdetteshowcaseYusufentwisthandshakeibisplottedsurnametangled