The word "mo" is a slang term that stands as a shortened version of the words "more" or "moment". Some popular synonyms for "mo" include further, extra, additional, increased, and prolonged. When used in reference to a moment, you can use synonyms such as instant, second, jiffy, or tick. However, when used as more, alternative options include additional, plus, supplementary, likewise, or in addition to. The use of synonyms is crucial to broaden our vocabulary and sentence structure. It also keeps the content engaging, informative and exciting for readers.