| keen(adjective, feeling, understanding, strong, sharp) |
| sharp(adjective, clear, feeling, understanding, strong) |
| trenchant(adjective, clear, feeling, strong, keen) |
| penetrating(adjective, understanding, strong, hard, keen) |
| acute(adjective, feeling, understanding, strong, keen) |
| biting(adjective, keen, sharp, penetrating, caustic) |
| cutting(verb, adjective, feeling, strong, hard) |
| acid(adjective, strong, sharp, intense, powerful) |
| piercing(adjective, feeling, strong, keen, sharp) |
| sarcastic(adjective, strong, sharp, penetrating, caustic) |
| caustic(adjective, feeling, strong, hard, keen) |
| sardonic(adjective, strong, severe, keen, sharp) |
| acerbic(adjective, sharp, cold, critical, piercing) |
| mordant(adjective, strong, hard, keen, sharp) |
| acrid |
| perceptive(adjective, understanding, strong, keen, sharp) |
| acrimonious(adjective, strong, hard, cold, powerful) |
| discriminating(adjective, sharp, shrewd, perceptive, penetrating) |
| perspicacious(adjective, understanding, keen, sharp, smart) |
| bitter(adjective, strong, hard, keen, sharp) |