The antonyms for the word "more whacko" can vary depending on the context in which it is used. Whacko generally means crazy, bizarre, or odd. Therefore, some antonyms could be sane, normal, or reasonable. Additional antonyms could be stable, predictable, or logical. In some cases, antonyms for "more whacko" could be conservative, traditional, or conformist. Ultimately, the antonyms depend on the intended contrast to the meaning of "more whacko" and convey the opposite connotations. Whether one wants to describe someone exhibiting regular behavior, sanity, or conventional thinking, antonyms for "more whacko" offer balance and clarity in communication.