| tight(adjective, strong, tough, firm, solid) |
| tried-and-true(adjective, good, strong, honest, solid) |
| tried and true(expression, adjective, idiom, close, correct) |
| true blue(expression, adjective, idiom, keen, firm) |
| trusted |
| unhesitating |
| unmoved(adjective, firm, cold, indifferent, unyielding) |
| well-made(adjective, strong, sound, tough, solid) |
| bound(adjective, strong, tough, flat, firm) |
| brawny(adjective, strong, fit, determined, healthy) |
| calm(adjective, strong, secure, firm, sensible) |
| caulk |
| changeless(adjective, firm, solid, stable, fixed) |
| daring(adjective, determined, vigorous, noble, resolute) |
| dead set on(expression, idiom, strong, intense, deliberate) |
| definite(adjective, good, strong, firm, solid) |
| doting(adjective, kind, true, caring, loving) |
| endure |
| energetic(adjective, strong, sound, tough, solid) |
| fit(adjective, strong, healthy, well, robust) |