The antonyms for the word "not works" include various terms that signify success, progress, and efficiency. Some of these synonyms include effective, productive, fruitful, lucrative, prosperous, advantageous, thriving, flourishing, functioning, and operational. These terms all convey the opposite of the phrase "not works," as they describe an outcome in which everything is functioning as intended and yielding positive results. The use of antonyms is beneficial in language as it helps to amplify the richness of the vocabulary and allows for a more precise and clear communication of ideas.