Feel in return is an idiomatic expression that means to reciprocate a feeling or emotion. Sometimes we may feel a certain way towards someone or something, but the same feeling may not be reciprocated. In such cases, we may use antonyms of 'feel in return' to express the opposite emotion. For example, instead of feeling happy in return, we may feel sad. Similarly, antonyms for 'feel in return' could include indifference, dislike or hatred. For instance, if someone loves you, but you don't feel the same way about them, you may use the antonym to express a negative emotion. In summary, antonyms for 'feel in return' are used to convey an emotion that contradicts the original feeling.