| unstoppable |
| unyielding(adjective, resolute) |
| venturous(noun, adjective, strong, tough, noble) |
| zealous(adjective, clear, tough, severe, energetic) |
| Trojan(strong, tough, bold, spirited, brave) |
| active(adjective, energetic, passionate, determined, bold) |
| aggressive(determined, spirited, daring, adventurous, enterprising) |
| alert(adjective, smart, bright, energetic, determined) |
| animate(adjective, bright, energetic, passionate, determined) |
| animated(adjective, smart, energetic, determined, elegant) |
| ardent(adjective, bright, energetic, passionate, lively) |
| avid(adjective, bright, energetic, passionate, determined) |
| ballsy(bold, confident, fearless) |
| bauld(noun, adjective) |
| bodacious |
| bouncy(adjective, bright, energetic, passionate, determined) |
| brassy(adjective, smart, bold, sure, brave) |
| bulldogged(adjective, tenacious) |
| bulldoggish |
| burning(adjective, bright, energetic, passionate, determined) |