| sour(adjective, bitter, acid, tart, astringent) |
| acid(adjective, sharp, unpleasant, bitter, sour) |
| vinegary(adjective, sharp, unpleasant, bitter, sour) |
| acerb(adjective, sharp, unpleasant, bitter, sour) |
| acerbic(adjective, severe, harsh, bitter, sour) |
| acetous(adjective, sharp, unpleasant, bitter, sour) |
| acrid(adjective, severe, sharp, harsh, unpleasant) |
| biting(adjective, severe, sharp, harsh, unpleasant) |
| bitter(adjective, severe, sharp, harsh, unpleasant) |
| sharp(adjective, severe, harsh, unpleasant, bitter) |
| tart(adjective, sharp, unpleasant, bitter, sour) |
| acetose(adjective, sharp, unpleasant, bitter, sour) |
| acetylic |
| acidic(adjective, sharp, unpleasant, bitter, sour) |
| acidulated(adjective, sharp, unpleasant, bitter, sour) |
| acidulous |
| astringent(adjective, severe, sharp, harsh, unpleasant) |
| bad(adjective, sharp, unpleasant, bitter, sour) |
| briny(adjective, sharp, unpleasant, bitter, sour) |
| caustic(adjective, severe, sharp, harsh, unpleasant) |