| obduracy(noun, resolve, determination, firmness, persistence) |
| tenacity(noun, resolve, firmness, obstinacy, stubbornness) |
| application(noun, resolve, determination, firmness, persistence) |
| backbone(noun, resolve, determination, firmness, persistence) |
| chutzpah(noun, resolve, determination, firmness, persistence) |
| clock(noun, resolve, determination, firmness, persistence) |
| diligence(noun, resolve, determination, firmness, persistence) |
| doggedness(noun, resolve, determination, firmness, persistence) |
| fortitude |
| grit(noun, resolve, determination, firmness, persistence) |
| guts(noun, resolve, determination, firmness, persistence) |
| gutsiness(noun, resolve, determination, firmness, persistence) |
| guttiness(noun, resolve, determination, firmness, persistence) |
| heart(noun, resolve, determination, firmness, persistence) |
| inflexibility(noun, resolve, determination, firmness, persistence) |
| intestinal fortitude(noun, expression, resolve, determination, firmness) |
| intransigence(noun, resolve, determination, firmness, persistence) |
| moxie(noun, resolve, determination, firmness, persistence) |
| nerve(noun, resolve, determination, firmness, persistence) |
| obstinacy(noun, resolve, determination, firmness, stubbornness) |