The term "human male" can be substituted with a variety of other words and phrases. Some synonyms include "man," "male individual," "gentleman," "male person," "masculine being," and "he." Each of these phrases conveys the idea of a male human being, but some may have different connotations or levels of formality. For example, "man" is a commonly used, straightforward term, while "gentleman" may imply a certain level of sophistication or decorum. It's important to consider the context and audience when choosing a synonym for "human male" to ensure the most appropriate and effective term is used.