| steadfastness(noun, drive, energy, resolve, determination) |
| tenacity(noun, drive, energy, resolve, determination) |
| bullheadedness(noun, determination, resolution, perseverance, obstinacy) |
| courageousness(noun, resolution, courage, valor) |
| doggedness(noun, drive, energy, resolve, determination) |
| fearlessness(noun, drive, energy, spirit, resolve) |
| guts(noun, drive, energy, spirit, resolve) |
| intractability(obstinacy, inflexibility) |
| resoluteness(noun, drive, energy, resolve, determination) |
| spunk(noun, drive, energy, spirit, resolve) |
| strength |
| stubbornness(noun, drive, energy, resolve, determination) |
| toughness(noun, resolution) |
| vigor(noun, spirit, determination, courage, temperament) |
| abidingness(noun, perseverance) |
| adamancy(noun, determination, perseverance, obstinacy, stubbornness) |
| assurance(noun, drive, energy, resolve, determination) |
| certainty(noun, drive, energy, resolve, determination) |
| certitude(noun, drive, energy, resolve, determination) |
| chutzpah |