The word "un-similar" means that two things are not alike or different. The antonyms for "un-similar" could include similar, the same, identical, alike, or homogeneous. For example, two apples that are the same color and size are similar, while two different types of apples are un-similar. Similarly, identical twins are the same, while non-identical siblings are un-similar. Alike refers to things or people that share common characteristics, while homogeneous describes things that are composed of the same or similar parts. Antonyms for "un-similar" focus on highlighting the similarities rather than the differences between things.