The term "master works" refers to works of art or literature that are considered exceptional or of the highest quality. Antonyms for this term would be words that describe works that are mediocre, average, or of poor quality. Some of the antonyms for "master works" include "mediocre works," "run-of-the-mill works," "ordinary works," "uninspired works," and "mundane works." These antonyms are often used to describe works that lack creativity, originality, and depth. While "master works" evoke feelings of awe, admiration, and inspiration, their antonyms tend to elicit feelings of boredom, indifference, and disappointment.