Spreading too thin is a phrase that means overextending oneself to the point where it becomes difficult to effectively manage or handle tasks. There are several other synonyms that can be used to convey a similar meaning, including overburdened, overstretched, stretched too thin, overcommitted, and overtaxed. Each of these words can be used to describe a situation in which someone has taken on too much work or responsibility and is struggling to keep up. By using these synonyms, it becomes easier to convey the sense of overwhelm and exhaustion that comes from spreading oneself too thin.