| unpleasurable(adjective, dull, weak, flat, boring) |
| unsavory(adjective, dull, weak, flat, boring) |
| unseasoned(adjective, dull, weak, flat, boring) |
| vanilla(adjective, dull, weak, flat, boring) |
| vapid(adjective, dull, weak, flat, boring) |
| watered-down(adjective, dull, weak, flat, boring) |
| watery(adjective, dull, weak, flat, boring) |
| weak(adjective, dull, flat, boring, puny) |
| wimpy(adjective, insignificant, unimportant, trivial, minor) |
| without flavor(expression, adjective, dull, weak, flat) |
| without spice(expression, adjective, dull, weak, flat) |
| zero(adjective, dull, weak, flat, boring) |
| banal |
| bush-league(adjective, inconsequential, wimpy) |
| frivolous(insignificant, unimportant, minor) |
| inadequate(adjective, insignificant, unimportant, trivial, minor) |
| inappropriate(insignificant, unimportant, minor) |
| insignificant(adjective, unimportant, trivial, minor) |
| insufficient(adjective, insignificant, unimportant, trivial, minor) |
| irrelevant(insignificant, unimportant, minor) |