The phrase "not much to look at" implies that something is unattractive or visually unappealing. Antonyms for this phrase could include words such as beautiful, stunning, attractive, and eye-catching. These words describe something that catches the eye or is visually striking. Other antonyms could include words such as impressive, remarkable, notable, or outstanding. These words describe something that stands out and leaves a lasting impression. Additionally, words like charming, delightful, and alluring could be considered antonyms as they describe something that is visually pleasing and enticing.