| unpleasurable(adjective, dull, weak, flat, boring) |
| unseasoned(adjective, dull, weak, flat, boring) |
| untasteful |
| untasty |
| vanilla(adjective, dull, weak, flat, boring) |
| watered-down(adjective, dull, weak, flat, boring) |
| watery(adjective, dull, weak, flat, boring) |
| weak(adjective, dull, flat, boring, distasteful) |
| without flavor(expression, adjective, dull, weak, flat) |
| without spice(expression, adjective, dull, weak, flat) |
| yicky(offensive, unpleasant, disgusting, painful, tasteless) |
| zero(adjective, dull, weak, flat, boring) |
| acid(adjective, nasty, unpleasant, disagreeable, distasteful) |
| banal(adjective, unpleasant, disgusting, dreary, unattractive) |
| bum(adjective, bad, offensive, foul, revolting) |
| damaging(adjective, bad, offensive, foul, revolting) |
| dangerous(adjective, bad, offensive, foul, revolting) |
| detestable(offensive, unpleasant, disgusting, painful, tasteless) |
| dirty(adjective, bad, offensive, foul, revolting) |
| dreary(adjective, unpleasant, disgusting, unattractive) |