The phrase "be commensurate" can be replaced by several synonyms. Words like "proportional," "corresponding," "coextensive," and "equivalent" can be used in its place. Additionally, "commensurable," "measurable," "balanced," and "adequate" are also suitable options. These words all convey the idea of something being in harmony or in balance with another factor. For example, if a person's efforts are commensurate with their job responsibilities, it means that they are putting in an appropriate amount of work for the duties expected of them. In summary, there are many synonyms available for "be commensurate," each of which conveys the same idea of balance and proportionality.