prompt 15 synonyms and 6 antonyms for prompt, ranked by how commonly they're used. Adj — Done quickly, without delay. Synonyms for prompt fast hasty now on time post-haste on the double quick quick as a wink rapid rash right away soon speedy spit-spot stat Antonyms for prompt havering hesitant hesitative tremulous trepidatious vacillatory ← Back to the full definition of prompt
