The word "un-equivalent" means not equal in value or importance. Antonyms for this term would be "equivalent", "matched", "corresponding", "commensurate", "parallel", "identical", "same", "equal", "similar", "proportionate", and "alike". These words describe items that are equal in value or importance, similar in nature or proportion, and correspond to each other. For instance, two integers are equivalent if they have the same numerical value, while two geometric shapes are equal if they have the same size and shape. Similarly, two concepts are equivalent if they share the same meaning or purpose. The antonyms for "un-equivalent" broaden our understanding of what it means for things to match or share similar characteristics.