Antonyms for the phrase "are equivalent to" can be different, unlike, dissimilar or unequal. When two things are equivalent, they share a similar meaning or value. However, antonyms like dissimilar or unequal express the opposite of equivalence. For example, apples and oranges are dissimilar; they are not the same fruit, and have different taste and characteristics. Likewise, two individuals may have unequal abilities, knowledge or intelligence, and therefore be dissimilar. While some may argue that using antonyms for equivalent can create confusion, it is essential to understand that antonyms allow writers to express ideas that are not equivalent, which in turn add clarity and meaning to their writing.