Antonyms of adj antithetic

1 sense of antithetic

Sense 1
antithetic, antithetical -- (sharply contrasted in character or purpose; "practices entirely antithetical to her professed beliefs"; "hope is antithetic to despair")

INDIRECT (VIA different) -> same -- (closely similar or comparable in kind or quality or quantity or degree; "curtains the same color as the walls"; "two girls of the same age"; "mother and son have the same blue eyes"; "animals of the same species"; "the same rules as before"; "two boxes having the same dimensions"; "the same day next year")

Similarity of adj antithetic

1 sense of antithetic

Sense 1
antithetic, antithetical -- (sharply contrasted in character or purpose; "practices entirely antithetical to her professed beliefs"; "hope is antithetic to despair")
       => different (vs. same) -- (unlike in nature or quality or form or degree; "took different approaches to the problem"; "came to a different conclusion"; "different parts of the country"; "on different sides of the issue"; "this meeting was different from the earlier one")