| soothing(adjective, calm, weak, smooth, soft) |
| soso |
| square(adjective, simple, flat, clean, plain) |
| sterile |
| stiff |
| strenuous(adjective, dull, boring, tired, tedious) |
| sunny(adjective, calm, weak, smooth, soft) |
| superficial |
| temperate(adjective, calm, weak, smooth, soft) |
| tempered(adjective, calm, weak, smooth, soft) |
| tepid(adjective, calm, weak, smooth, soft) |
| tired(adjective, dull, boring, tedious, tame) |
| toneless(adjective, dull, boring, tedious, dreary) |
| too much(expression, adjective, dull, boring, tired) |
| tough(adjective, dull, boring, tired, tedious) |
| trying(adjective, dull, boring, tired, tedious) |
| unchanged(adjective, dull, flat, boring, tedious) |
| unchanging(adjective, dull, flat, boring, tedious) |
| uncool(adjective, dull, boring, tired, disagreeable) |
| unexceptional(adjective, simple, clean, plain, ordinary) |