| indomitable(adjective, strong, firm, determined, steady) |
| inerrant(certain, unquestionable, undisputable) |
| interminable(adjective, continue) |
| lasting(adjective, certain, fixed, reliable, continuous) |
| nonstop(adjective, continue) |
| ongoing(adjective, continue) |
| plodding(adjective, strong, firm, determined, steady) |
| plugging(adjective, strong, firm, determined, steady) |
| positive(adjective, good, clear, strong, solid) |
| purposeful |
| responsible(adjective, good, honest, sensible, solid) |
| static(set, regular, fixed, constant, rigid) |
| staying |
| straight(adjective, open, honest, solid, certain) |
| strong(adjective, good, firm, honest, solid) |
| tried-and-true(adjective, good, strong, honest, solid) |
| true-blue(adjective, good, strong, open, honest) |
| true blue(honest, sensible, realistic, reliable, mature) |
| unaltered(adjective, uniform, unchanging, unchanged) |
| unbroken |