The term "more unnoteworthy" implies that something is even less remarkable or noteworthy than it already is. To provide antonyms for this phrase, we could use words that indicate something is exceptional, noteworthy, or remarkable. These words include "exceptional," "remarkable," "extraordinary," or "impressive." Alternatively, we could use words that suggest something is significant or substantial, such as "meaningful," "important," or "valuable." By using antonyms for "more unnoteworthy," we can effectively convey the opposite meaning and emphasize the importance or value of something, rather than dismissing it as unremarkable or insignificant.