| bold(adjective, strong, tough, vigorous, noble) |
| bouncing(adjective, strong, tough, intense, energetic) |
| doughty(adjective, strong, tough, bold, resolute) |
| driving(adjective, strong, tough, energetic, powerful) |
| enterprising(adjective, strong, tough, intense, energetic) |
| fearless(adjective, strong, vigorous, noble, bold) |
| forcible(adjective, strong, tough, energetic, powerful) |
| gritty(adjective, strong, tough, bold, spirited) |
| gutsy(adjective, strong, tough, bold, spirited) |
| intrepid(adjective, strong, vigorous, noble, bold) |
| iron(adjective, strong) |
| kinetic(adjective, strong, moving, energetic, lively) |
| nervy(adjective, strong, tough, bold, spirited) |
| noble(adjective, vigorous, courageous, virile) |
| peppy(adjective, strong, tough, energetic, powerful) |
| robustious(robust, well-built, zappy) |
| sound(adjective, strong, tough, intense, energetic) |
| stout-hearted(adjective, vigorous, noble, courageous, muscular) |
| tenacious(adjective, strong, tough, bold, resolute) |
| valiant(adjective, strong, vigorous, noble, bold) |