| rigid(adjective, firmness, persistent, rigidity, obstinacy) |
| firm(adjective, firmness, persistent, obstinate, insistent) |
| inexorable(adjective, firmness, persistent, obstinate, insistent) |
| intractable(adjective, firmness, persistent, obstinate, insistent) |
| iron(adjective, firmness, persistent, obstinate, insistent) |
| relentless(adjective, firmness, persistent, obstinate, insistent) |
| stern(adjective, firmness, persistent, obstinate, insistent) |
| contrary(adjective, persistent, obstinate, persistence, insistent) |
| hidebound(adjective, persistent, obstinate, persistence, insistent) |
| stubborn(adjective, characteristic, quality, firmness, persistence) |
| tenacious(adjective, persistent, obstinate, persistence, insistent) |
| crazy |
| inflexible(adjective, firmness, persistence, rigidity, obstinacy) |
| bloody-minded(adjective, persistent, obstinate, insistent, dogged) |
| contumacious(adjective, persistent, obstinate, insistent, dogged) |
| defiant(adjective, persistent, obstinate, insistent, dogged) |
| demanding(adjective, persistent, obstinate, insistent, dogged) |
| determined(adjective, persistent, obstinate, insistent, dogged) |
| froward(adjective, persistent, obstinate, insistent, dogged) |
| hard-line(adjective, persistent, obstinate, insistent, dogged) |