| monosyllabic |
| nitwitted(adjective, slight, thin, plain, disciplined) |
| no great shakes(expression, adjective, idiom, smart, plain) |
| no problem(expression, adjective, smart, plain, sophisticated) |
| no sweat(expression, adjective, smart, plain, sophisticated) |
| not beautiful(expression, adjective, obscure, plain, vague) |
| not complex(expression, adjective, difficult, plain, dirty) |
| not difficult(expression, adjective, hard, difficult, plain) |
| not figurative(expression, adjective, plain, false, counterfeit) |
| open and shut(expression, adjective, idiom, plain, extraordinary) |
| ordinary(adjective, smart, plain, superior, disciplined) |
| out and out(expression, adjective, idiom, difficult, plain) |
| plain-featured(adjective, obscure, plain, attractive, ambiguous) |
| plain-vanilla |
| pure(adjective, obscure, plain, dark, false) |
| pure and simple(expression, adjective, idiom, obscure, plain) |
| run of the mill(expression, adjective, idiom, difficult, plain) |
| second rate(expression, adjective, smart, plain, irregular) |
| simple as ABC(expression, adjective, idiom, smart, plain) |
| snapper(adjective, smart, plain, sophisticated, disciplined) |