The term "are commensurate" refers to two things being in proportionate size, degree or extent. The antonyms of "are commensurate" are "disproportionate," "unequal," "incommensurable," and "disparate." These antonyms indicate a lack of proportion or equality between the two things being compared. If two things are disproportionate, they differ in size or scale, making it challenging to compare them correctly. Similarly, if two things are unequal, they don't have the same value or importance. Incommensurable denotes that two things cannot be compared or measured against each other because they are entirely different. And, disparate refers to things that have no similarity or connection.