Nonuses refer to activities or substances that have no practical or useful value. There are several synonyms for this term, including frivolities, trinkets, baubles, duds, emptiness, futilities, and junk. These words denote items that are lacking in utility, purpose, or value. Frivolities are often trivial or silly activities or objects that serve no particular purpose. Trinkets and baubles describe small, decorative objects that are aesthetically pleasing but have no functional use. Duds are items that do not fulfill their intended purpose or do not meet expectations. Futilities are actions or things that are pointless or ineffective. Junk typically refers to discarded or useless items. All of these synonyms share the common theme of lacking in usefulness or practical value.