| nonstop(adjective, dull, steady, stable, regular) |
| periodic(adjective, regular, normal, recurrent) |
| persistent(adjective, common, regular, normal, constant) |
| stock(adjective, simple, flat, ordinary, familiar) |
| continuing(adjective, continuous) |
| dry-as-dust |
| everlasting(adjective, persistent, constant, abundant, continuous) |
| exhausting(adjective, dull, boring, tedious, irritating) |
| gapless(adjective, continuous) |
| heavy(adjective, dull, flat, ordinary, dry) |
| homogeneous(adjective, dull, steady, stable, regular) |
| irksome(adjective, dull, simple, excite, plain) |
| level(adjective, quiet, soft, gentle, flat) |
| perennial(adjective, continuous) |
| perpetual(adjective, steady, stable, regular, fixed) |
| prosy(adjective, dull, weak, simple, flat) |
| repeated(adjective, dull, regular, boring, normal) |
| rhythmic(adjective, quiet, soft, gentle, flat) |
| seamless(adjective, continuous) |
| straight(adjective, calm, soft, reasonable, gentle) |