| irresistible(adjective, determination, firmness, inevitability) |
| adamant(adjective, harsh, cruel, determined, fierce) |
| intransigent(adjective, determination, bravery, persistence) |
| raging(adjective, determination, bravery, persistence) |
| resolute(adjective, determination, bravery, persistence) |
| resolved(adjective, determination, bravery, persistence) |
| stark(adjective, determination, bravery, persistence) |
| steely(adjective, determination, bravery, persistence) |
| stiff-necked(adjective, determination, bravery, persistence) |
| tireless(adjective, determination, bravery, persistence) |
| tough(adjective, determination, bravery, persistence) |
| unafraid(adjective, determination, bravery, persistence) |
| vindictive(adjective, harsh, cruel, determined, fierce) |
| inexorable(adjective, harsh, cruel, determined, fierce) |
| implacable(adjective, harsh, cruel, determined, fierce) |
| inflexible(adjective, harsh, cruel, determined, fierce) |
| ineluctable(adjective, determination, firmness, inevitability) |
| insuppressible(adjective, wild, vivacious, buoyant, effervescent) |
| rigorous(adjective, harsh, cruel, determined, fierce) |
| ruthless(adjective, harsh, cruel, determined, fierce) |