There are several synonyms that can be used in place of the term "masculinity proportion". One such synonym is "manliness ratio." This term refers to the degree or level of manliness or masculinity, and the proportion it holds in relation to other characteristics. Another synonym is "male dominance scale," which refers to the degree to which males are dominant in a given environment or situation. Other possible synonyms include "masculine balance," which could refer to the proper equilibrium of masculine traits within an individual or group, and "testosterone index," which could refer to the level of the hormone testosterone in a male.