| smacking |
| sound(adjective, strong, tough, intense, energetic) |
| spark plug(expression, adjective, energetic, daring, resourceful) |
| steamroller(adjective, strong, tough, energetic, violent) |
| stirring(adjective, energetic, daring, resourceful, innovative) |
| strapping(adjective, strong, tough, intense, energetic) |
| strenuous(adjective, strong, tough, intense, energetic) |
| stringent(adjective, strong, energetic, violent, powerful) |
| strong as an ox(expression, adjective, idiom, strong, tough) |
| strong as ox(expression, adjective, idiom, vigorous, overkill) |
| sturdy(adjective, strong, tough, intense, energetic) |
| take-charge(adjective, strong, tough, energetic, violent) |
| takeover(adjective, energetic, vigorous, desirous, daring) |
| telling(adjective, strong, energetic, violent, powerful) |
| titanic(adjective, strong, energetic, violent, powerful) |
| tough(adjective, strong, intense, energetic, powerful) |
| trenchant |
| up-and-coming(adjective, energetic, daring, resourceful, innovative) |
| up and coming(expression, adjective, idiom, energetic, desirous) |
| uprising |