| thin(adjective, dull, weak, flat, boring) |
| uninteresting(adjective, dull, weak, flat, nasty) |
| unsavoury |
| watered-down(adjective, dull, weak, flat, thin) |
| afflictive(offensive, unpleasant, disgusting, painful, tasteless) |
| aseptic(adjective, excite) |
| big zero(expression, adjective, dull, weak, flat) |
| bitter(adjective, nasty, offensive, unpleasant, disgusting) |
| blah(adjective, dull, weak, flat, plain) |
| blind(adjective, dull, weak, dead, tedious) |
| dim(adjective, dull, weak, dead, tedious) |
| disagreeable(adjective, nasty, offensive, unpleasant, disgusting) |
| dislikable(offensive, unpleasant, disgusting, painful, tasteless) |
| displeasing(adjective, offensive, unpleasant, disgusting, hateful) |
| drab(adjective, excite) |
| draggy(adjective, dull, weak, dead, tedious) |
| dull as dishwater(expression, adjective, idiom, dull, weak) |
| fade |
| fixed |
| galling(offensive, unpleasant, disgusting, painful, tasteless) |