| bitter(adjective, strong, hard, severe, taste) |
| sharp(adjective, attack, strong, hard, respect) |
| pungent(adjective, attack, strong, respect, sharp) |
| harsh(adjective, tough, severe, taste, sharp) |
| biting(verb, adjective, attack, strong, respect) |
| acid(noun, adjective, attack, strong, respect) |
| caustic(adjective, attack, strong, respect, severe) |
| sour(adjective, strong, hard, tough, severe) |
| acerbic(adjective, attack, respect, severe, taste) |
| acrimonious(adjective, strong, tough, nasty, harsh) |
| mordant(adjective, attack, respect, nasty, pungency) |
| cutting(verb, adjective, attack, strong, respect) |
| vitriolic(adjective, attack, respect, nasty) |
| tart(noun, adjective, strong, tough, sharp) |
| stinging(adjective, attack, strong, respect, sharp) |
| sarcastic(adjective, strong, keen, sharp, nasty) |
| astringent(adjective, attack, hard, respect, severe) |
| acerb(adjective, sharp, harsh, unpleasant, bitter) |
| acute(adjective, strong, sharp, property, powerful) |
| virulent |