| undaunted(adjective, strong, fear, vigorous, noble) |
| able(adjective, strong, sound, tough, fit) |
| adventuresome(adjective, mad, bold, naughty, impudent) |
| beefy(adjective, person, body) |
| chipper(adjective, good, clear, strong, great) |
| chivalrous(adjective, strong, bold, spirited, brave) |
| dashing(adjective, strong, tough, energetic, powerful) |
| defiant(adjective, mad, bold, brave, naughty) |
| florid(adjective, health, good, clear, pleasant) |
| full-blooded(adjective, strong, purebred) |
| in fine fettle(expression, adjective, idiom, strong, tough) |
| lionhearted(strong, tough, bold, resolute, spirited) |
| persistent(tough, determined, resolute, sturdy, hard-wearing) |
| resilient(adjective, strong, tough, sturdy, flexible) |
| salubrious(adjective, healthy) |
| stable(adjective, strong, sound, tough, solid) |
| unflagging(adjective, strong, tough, fit, lively) |
| well-built(adjective, person, body, strong, sound) |
| wholesome(adjective, good, clear, great, sound) |
| adamantine(adjective, strength) |