| rugged(adjective, strong, sound, tough, intense) |
| stiff(adjective, strong, great, severe, firm) |
| bold(adjective, tough, keen, smart, bright) |
| brisk(adjective, action, strong, tough, keen) |
| coercive(adjective, severe, harsh, passionate, violent) |
| constraining(adjective, strong, powerful, effective, dynamic) |
| decided(adjective, clear, firm, energetic, certain) |
| eager(adjective, clear, strong, tough, severe) |
| electric(adjective, strong, energetic, powerful, lively) |
| emphasized |
| extreme(adjective, strong, severe, harsh, intense) |
| fervid(adjective, clear, strong, tough, severe) |
| fierce(adjective, clear, strong, great, tough) |
| forward |
| harsh(adjective, strong, severe, intense, powerful) |
| hefty(adjective, strong, tough, big, determined) |
| important(adjective, energetic, powerful, significant, noble) |
| loud(adjective, noble, frank, strident, booming) |
| obstinate |
| operative(adjective, strong, power, valid, legal) |