Sharply, cutting, acicular, acute, acerb, booming, abrasive, acute, clear-cut, abrupt, acute, artful, chic, dead on, abruptly, and all of a sudden are all synonyms for sharp. Dull and blunt are these antonyms of sharp. And here are another 248 synonyms for sharp.
1. keen
2. pointed
3. excruciating
4. tangy
5. loud
6. harsh
7. intense
8. distinct
9. sudden
10. observant
11. clever
12. smart
13. precisely
14. abruptly