| fearless |
| fixed(adjective, close, strong, hard, sound) |
| gutsy |
| hale and hearty(expression, adjective, idiom, strong, fit) |
| lasting(adjective, calm, strong, tough, solid) |
| obstinate |
| perfect(adjective, person, complete, solid, healthy) |
| portly(adjective, strong, stout, brawny, husky) |
| refractory(adjective, hard, tough, solid, rigid) |
| resilient(adjective, strong, tough, robust, unaffected) |
| robustious(adjective, strong, tough, fit, healthy) |
| safe and sound(adjective, person, strong, tough, fresh) |
| steely(strong, hard, tough, rugged) |
| stubborn(adjective, strong, hard, tough, firm) |
| tight(adjective, close, strong, hard, tough) |
| unbreakable |
| venturesome(adjective, courageous) |
| well-founded(adjective, calm, strong, sound, secure) |
| broad-shouldered(adjective, person, body, strong, robust) |
| chunky |