The word "be dissimilar" refers to things that are different from each other. However, there are various antonyms for this term that denote similarity or sameness. One antonym of "be dissimilar" is "be alike," which means that two or more things resemble each other. Another opposite term is "be similar," which refers to things that closely match or resemble each other. "Be identical" is another antonym for "be dissimilar," indicating that two or more things are identical or indistinguishable. Finally, "be the same" is yet another antonym for this term, denoting the presence of identical features or characteristics between two or more things.