| patient(noun, adjective, strong, firm, energetic) |
| perseverant(adjective, determined) |
| purposeful(adjective, strong, tough, firm, deliberate) |
| stalwart(adjective, intense, deliberate, determined, resolute) |
| strenuous(adjective, energetic, zealous, perseverance) |
| unshakable(adjective, strong, tough, firm, determined) |
| unvarying(adjective, steady, regular, even, constant) |
| bound(adjective, strong, tough, flat, firm) |
| brave(adjective, determined, resolute, persevering, tenacious) |
| bullheaded(adjective, tough, firm, determined, unreasonable) |
| courageous(adjective, firm, determined, resolute, unyielding) |
| dauntless(adjective, resolute, tenacious) |
| decisive(adjective, determined, serious, resolute, unyielding) |
| earnest(adjective, energetic, active, serious, resolute) |
| headstrong(adjective, tough, firm, determined, unreasonable) |
| intractable(adjective, tough, firm, determined, obstinate) |
| mulish(adjective, tough, firm, determined, resolute) |
| plucky(adjective, determined, resolute, tenacious) |
| recurring(adjective, regular, normal, continuous, lasting) |
| true(adjective, strong, tough, flat, firm) |