The antonyms of the word "un noted" are "noted," "remarkable," "famous," and "well-known." When someone or something is "noted," it means they have become recognizable or distinguished for a particular quality or achievement. On the other hand, "un noted" implies that something has gone unnoticed or unappreciated. By contrast, synonyms such as "remarkable," "famous," or "well-known" suggest that an individual or object has achieved a certain level of acclaim or recognition. Using these antonyms in language can convey a sense of importance and recognition, which could add value and prestige to the subject under discussion.