| aggressive(adjective, keen, intense, violent, enthusiastic) |
| agile(adjective, keen, fit, intense, lively) |
| assiduous(adjective, work, active, labour, multitask) |
| chipper(adjective, good, clear, pleasant, keen) |
| forcible(adjective, strong, open, direct, sound) |
| lusty(adjective, strong, tough, fit, powerful) |
| mettlesome(adjective, strong, tough, powerful, lively) |
| mighty(adjective, strong, sound, tough, solid) |
| nimble(adjective, keen, fit, intense, lively) |
| perky(adjective, moving, keen, intense, lively) |
| sedulous(adjective, work, active, labour, multitask) |
| alert(adjective, good, clear, moving, pleasant) |
| driving(adjective, action, strong, tough, enthusiastic) |
| effervescent(adjective, enthusiastic, excited, lively, determined) |
| exuberant(adjective, person, strong, tough, enthusiastic) |
| smart(adjective, tough, lively, active, vigorous) |
| untiring(adjective, determined, active, vigorous, full) |
| alive(adjective, open, active, full, sensitive) |
| cheerful(adjective, person, keen, happy, agreeable) |
| dynamical(adjective, action, strong, moving, vigorous) |