The phrase "fool's bauble" can refer to a useless or nonsensical object. There are a variety of synonyms that might be used to describe such an object, including "trinket," "bauble," "knick-knack," or "gimmick." Other similar words might include "trifle," "bauble," "tchotchke," or "ornament." These words all describe something that is essentially frivolous or unimportant, and may be used to signify a lack of substance or importance in something. While some people may find such objects charming or whimsical, others may see them as foolish or trivial. Regardless of one's opinion, however, there are certainly many different synonyms that can be used to describe a "fool's bauble".
