The antonyms for the phrase "becomes similar" would include "opposes," "differs," "contrasts," "diverges," and "varies." When something becomes similar, it means that it is moving towards sameness, uniformity, or likeness. However, the antonyms for this phrase describe a movement or state of being that moves away from sameness and uniformity. For example, if two objects or individuals oppose each other, they are moving in opposite directions, making them distinct from one another. Similarly, if two objects differ from one another, it means that they are not similar or identical. Therefore, the antonyms for "becomes similar" represents a range of movements or states of being that move away from similarity.