When describing a component of something, there are several synonyms to replace the phrase "for part." These include "fraction," "proportion," "section," "segment," and "slice." Additionally, one could use "portion," "element," "piece," or "bit" to describe a smaller part of a whole. In more technical contexts, "module" or "component" could indicate a distinct part of a larger system. "Aspect" or "feature" would describe a characteristic of something, while "facet" would denote a particular aspect or element of a larger entity. Finally, "constituent" would imply an essential part that composes a whole. Each word helps provide greater precision and detail when describing the parts of something.