Non-identical means not exactly the same or dissimilar. Antonyms for non-identical includes identical, alike, same, comparable, matching, equivalent, uniform, congruous, homogeneous, and uniformed. Identical means exactly like the other, while alike is similar or resembling. Same refers to something identical, equal or alike. Comparable means things that can be likened or compared to each other. Matching refers to identical or similar things that complement each other. Equivalent means having the same value, worth or meaning. Uniform means identical in form, character, or quality. Congruous means in agreement or harmony, while homogeneous refers to the same kind or nature. Finally, uniformity refers to a state of being the same or uniform in nature, form or character.