| tough(adjective, strong, sound, smart, heavy) |
| unfailing(adjective, tireless) |
| violent(adjective, strong, great, sharp, harsh) |
| dashing(adjective, strong, moving, tough, keen) |
| effectual(strong, tough, sharp, effective, dynamic) |
| gay(adjective, sharp, bright, warm, intense) |
| hard(strong, powerful, penetrating) |
| hard-working(adjective, work, keen, intense, lively) |
| high |
| high-powered(adjective, active, full, dynamic, forceful) |
| hot(adjective, lively, determined, vigorous, forceful) |
| rapid(adjective, sharp, lively, fast, sprightly) |
| red-blooded(adjective, strong, tough, powerful, lively) |
| spanking(adjective, strong, tough, pleasant, powerful) |
| stimulating(adjective, open, moving, pleasant, lively) |
| swift(adjective, sharp, lively, fast, sprightly) |
| tenacious(adjective, strong, sound, tough, solid) |
| arduous(adjective, challenging) |
| authoritative(adjective, strong, powerful, effective, dynamic) |
| cheery(adjective, person, warm, enthusiastic, lively) |