| plane(adjective, quiet, soft, gentle, flat) |
| polite(adjective, kind, smooth, easy, gentle) |
| sapless(adjective, dull, weak, plain, mild) |
| serene(adjective, calm, quiet, cool, kind) |
| spiritless(adjective, calm, dull, weak, kind) |
| stodgy |
| sweet(adjective, quiet, cool, kind, gentle) |
| tired(adjective, dull, stupid, ordinary, commonplace) |
| two-dimensional |
| unassuming(adjective, calm, kind, smooth, soft) |
| undistinguished |
| unimaginative(adjective, dull, stupid, ordinary, boring) |
| unpalatable(adjective, dull, weak, flat, nasty) |
| unstimulating(adjective, weak, plain, mild, tasteless) |
| abstract(adjective, monotonous, neutral, colorless, expressionless) |
| anemic(dull, weak, feeble, insipid, uninteresting) |
| average(adjective, reasonable, sensible, restrained, modest) |
| bald |
| barren |
| benignant(adjective, weak, kind, smooth, soft) |