| exhibited(verb, adjective, evinced, evidential) |
| fast(adjective, honest, pure, sure, constant) |
| formal(adjective, established, orderly) |
| guaranteed(verb, adjective, set, solid, certain) |
| licensed(verb, adjective, authorized) |
| ordained(verb, adjective, authorized) |
| perpetual(adjective, usual, regular, routine, normal) |
| positive(adjective, certain, substantial, real, sure) |
| refractory(adjective, hard, severe, rough, harsh) |
| rigid(adjective, proper, determined, usual, regular) |
| staunch(adjective, honest, pure, sure, constant) |
| strengthened |
| strict(adjective, hard, rough, harsh, proper) |
| stubborn(adjective, characteristic, quality, hard, severe) |
| tenacious(adjective, persistent, obstinate, insistent, dogged) |
| tough(adjective, rough, obstinate) |
| unflinching(adjective, certain, limited, definite, inflexible) |
| unmanageable(adjective, hard, severe, rough, harsh) |
| usual(adjective, determined, common, regular, routine) |
| absolute(complete, certain, true, substantial, fixed) |