| obstinate(adjective, firm, intense, deliberate, determined) |
| tenacious(adjective, strong, flat, firm, intense) |
| unbending(adjective, strong, flat, firm, certain) |
| undeviating(adjective, strong, direct, smooth, right) |
| unflagging(adjective, set, strong, firm, solid) |
| dogged(adjective, strong, firm, solid, determined) |
| immovable(adjective, secure, firm, solid, determined) |
| obdurate(adjective, strong, secure, flat, certain) |
| unrelenting(adjective, determined, resolute, rigid, obstinate) |
| persevering(adjective, strong, flat, firm, certain) |
| indefatigable(adjective, set, strong, firm, determined) |
| resolved(adjective, strong, flat, firm, certain) |
| unbendable(adjective, determined, resolute, obstinate, uncompromising) |
| set(adjective, calm, strong, secure, flat) |
| stable(adjective, strong, direct, secure, smooth) |
| tireless(adjective, set, strong, firm, determined) |
| adamant(adjective, strong, secure, flat, firm) |
| dedicated(adjective, strong, firm, total, solid) |
| inexorable(adjective, determined, resolute, persistent, constant) |
| relentless(adjective, firm, determined, steady, resolute) |