| keen(adjective, feeling, understanding, strong, cool) |
| acute(adjective, feeling, understanding, strong, smooth) |
| intelligent(adjective, bright, smart, perceptive, keen) |
| clever(adjective, cool, sound, smooth, keen) |
| smart(adjective, activity, mean, style, feeling) |
| shrewd(adjective, mean, understanding, sound, smooth) |
| biting(adjective, characteristic, mean, attack, strong) |
| astute(adjective, mean, understanding, cool, sound) |
| piercing(adjective, characteristic, feeling, strong, cool) |
| penetrating(adjective, understanding, strong, hard, cool) |
| bitter(adjective, mean, strong, hard, cool) |
| quick(adjective, activity, feeling, understanding, cool) |
| cutting(verb, adjective, characteristic, mean, feeling) |
| alert(adjective, activity, understanding, strong, open) |
| severe(adjective, mean, strong, hard, cool) |
| incisive(adjective, clear, feeling, understanding, strong) |
| caustic(adjective, mean, feeling, attack, strong) |
| perceptive(adjective, understanding, strong, open, cool) |
| harsh(adjective, strong, hard, tough, severe) |
| pungent(adjective, feeling, attack, strong, hard) |