In-commensurable refers to something that cannot be measured or compared. Antonyms for the word would be measurable, commensurable, comparable, and quantifiable. These words indicate that the object or concept in question can be assessed and ranked according to a specific metric. In contrast, in-commensurable implies a subjective and immeasurable quality that cannot be quantified. Other antonyms include compatible, reconcilable, and relatable, which suggest that the concept in question is not inherently at odds with other ideas or values, and can be related to and understood within a broader context.