| infertile |
| insipid(adjective, dull, weak, flat, boring) |
| pale(adjective, white, colorless) |
| phlegmatic(adjective, indifferent, unenthusiastic, unconvinced, unexcited) |
| spiritless(adjective, dull, excite, boring, pale) |
| stock(adjective, dull, flat, silly, commonplace) |
| trite(adjective, dull, flat, silly, commonplace) |
| undistinguished(adjective, dull, simple, plain, inferior) |
| unexciting(adjective, dull, heavy, indifferent, ordinary) |
| average(adjective, dull, indifferent, inferior, ordinary) |
| banal(adjective, dull, set, flat, silly) |
| barren(adjective, dull, dry, boring, dead) |
| drab(adjective, dull, flat, excite, boring) |
| dreary(adjective, dull, heavy, ordinary, boring) |
| earthbound(adjective, dull, excite) |
| normal(adjective, simple, plain, indifferent, ordinary) |
| plain(adjective, dull, weak, simple, flat) |
| unaffected(adjective, insensibility) |
| unanimated(adjective, dull, boring, uninteresting, uninterested) |
| unremarkable(adjective, dull, simple, plain, indifferent) |