The phrase "be commensurable" refers to two things that can be compared and measured using a common standard or unit of measurement. There are several synonyms that can be used in place of "be commensurable." These include comparable, commensurate, proportional, in proportion, relative, and equivalent. These words all imply a sense of equality or balance between two things. For example, two items may have equivalent value or be in proportion to each other in terms of size or amount. When using synonyms for "be commensurable," it is important to consider the context and choose the word that best fits the intended meaning.