The antonyms of "un-noted" include words such as recognized, observed, detected, noted, and acknowledged. These words imply that something has been noticed or given attention to, the opposite of un-noted, which means something went unnoticed or wasn't recognized. Recognized, observed, and detected indicate that someone was watching or paying attention, while noted usually implies that something has been written down or recorded. Acknowledged generally means that someone has confirmed the existence or importance of something. Using antonyms in writing can add variety and depth to your work, helping you express your ideas more effectively.