| portly |
| robustious(strong, tough, fit, healthy, well) |
| robustuous(strong, tough, fit, healthy, well) |
| seasoned(adjective, strong, tough) |
| sizable(adjective, enthusiastic, vigorous, sincere, wholehearted) |
| sprightly(adjective, good, clear, strong, pleasant) |
| steadfast(strong, solid, determined, resolute, robust) |
| stiff(adjective, set, strong, hard, pleasant) |
| stout-hearted(noun, adjective, vigorous, noble, courageous) |
| toughened |
| uncompromising |
| untiring(adjective, strong, moving, lively, active) |
| unyielding(adjective, strong, hard, sound, tough) |
| valid(adjective, strength) |
| virile(strong, vigorous, noble, courageous, muscular) |
| vivacious(adjective, strong, moving, enthusiastic, lively) |
| whole(health, strong, great, tough, right) |
| wiry |
| Trojan(strong, tough, bold, resolute, spirited) |
| abiding |