Being unlike refers to a state where two things do not resemble each other in any way. The opposite or antonym of being unlike would be to be similar or alike. Therefore, if two things share similarities, they can be considered antonyms of being unlike. Other antonyms of being unlike would include matching, resembling, or identical. When two things are said to be alike, they possess common characteristics or features, making them similar to each other. Hence, if one intends to express that two things share some degree of similarity, they can use the antonyms of being unlike, such as similar or alike.