| stoical(adjective, calm, quiet, cool, gentle) |
| true(adjective, close, strong, correct, flat) |
| unaltered |
| undaunted(adjective, tenacious) |
| unflinching(adjective, strong, flat, certain, determined) |
| wholehearted(adjective, set, complete, firm, total) |
| abide |
| aged |
| alive(adjective, present, living, existing) |
| all-time(adjective, permanent, unsurpassed) |
| assiduous |
| being(verb, adjective, present, existing) |
| bold(adjective, tenacious) |
| bulldogged(adjective, tenacious) |
| confirmed(adjective, certain, limited, definite, persistent) |
| continuance(noun, increase, strength, line, resolution) |
| continuation(noun, increase, strength, line, resolution) |
| continuous(adjective, certain, steady, persistent, constant) |
| decisive(adjective, great, extraordinary, outstanding, notable) |
| deep(adjective, great, high, remote, long) |