The word nonbarbaric refers to something that is civilized, cultured, and refined. When looking for antonyms or opposite words for nonbarbaric, one might consider using words like savage, crude, uncultured, and primitive. These words describe things that lack sophistication and refinement. In contrast, the antonyms for nonbarbaric could include words like polished, sophisticated, urbane, and cultured. These words suggest an elevated level of refinement and education, emphasizing the sophistication and class of people, places, or things. Overall, the antonyms for nonbarbaric describe a level of refinement and culture that is of a higher order, distinguished, and contrast with the hollow savagery of barbarism.