The word "units" can refer to a variety of things, including military groups, measurements of time or space, or individual components of a whole. Depending on the context, there are several synonyms that can be used to replace the word "units." For military groups, alternatives include squads, battalions, or divisions. In terms of measuring time or space, "units" can be replaced with increments, portions, or segments. When referring to individual parts of a whole, alternative words for "units" might include elements, modules, or components. Selecting the right synonym for "units" ultimately depends on the specific context in which the word is being used.