| insipid(adjective, dull, flat, stupid, ordinary) |
| routine(adjective, dull, simple, flat, plain) |
| tiresome(adjective, flat, stupid, ordinary, dry) |
| uninventive(adjective, dull, dry, boring, rich) |
| barren(adjective, dull, predictable, uninspired) |
| mediocre(adjective, uninspired) |
| stereotypic |
| tired(adjective, dull, flat, stupid, ordinary) |
| vapid(adjective, dull, simple, flat, plain) |
| bland(adjective, dull, stupid, ordinary, boring) |
| lifeless(adjective, dull, simple, tough, flat) |
| mundane(adjective, dull, simple, tough, plain) |
| sterile(adjective, dull, excite, dry, boring) |
| uninteresting(adjective, dull, flat, heavy, ordinary) |
| jejune(adjective, dull, flat, stupid, ordinary) |
| prosy(adjective, dull, simple, tough, flat) |
| stereotypical |
| stock(adjective, dull, flat, common, stupid) |
| stodgy(adjective, dull, excite, stuffy) |
| stupid(adjective, dull, flat, ordinary, dry) |