| dim(adjective, dull, boring, routine, tedious) |
| dime a dozen(expression, adjective, idiom, dull, moderate) |
| drab(adjective, dull, simple, flat, clean) |
| dreary(adjective, dull, boring, routine, tedious) |
| garden variety(adjective, ordinary) |
| general(adjective, moderate, ordinary, usual, regular) |
| good |
| ho-hum(adjective, simple, flat, clean, plain) |
| homely |
| insipid(adjective, dull, indifferent, boring, routine) |
| intermediate(adjective, moderate, ordinary, usual, regular) |
| irksome(adjective, simple, flat, clean, plain) |
| lackluster(adjective, simple, flat, clean, plain) |
| lifeless(adjective, dull, simple, flat, clean) |
| lowly(adjective, simple, clean, plain, ordinary) |
| lusterless(adjective, simple, flat, clean, plain) |
| mainstream(adjective, moderate, ordinary, usual, regular) |
| matter-of- fact(expression, adjective, simple, clean, plain) |
| middle-of-the-road |
| middle of the road(expression, adjective, idiom, moderate, ordinary) |