The word "antitraditional" refers to something that goes against tradition or is non-traditional. Its antonyms, therefore, would be words that indicate conformity to or adherence to traditional norms or practices. Antonyms for "antitraditional" could include words like traditional, conventional, customary, classic, orthodox, standard, and mainstream. These words all suggest adherence to established norms, practices, or expectations, and stand in contrast to "antitraditional" which suggests a departure from tradition. Using these antonyms in context can help to highlight the importance of tradition, convention, and expected norms in our lives and culture.