| effective(adjective, strong, tough, energetic, powerful) |
| efficient(adjective, strong, tough, intense, energetic) |
| enduring(adjective, strong, sound, tough, fit) |
| enormous(adjective, person, body) |
| enterprising(adjective, strong, tough, intense, energetic) |
| exercise-related(adjective, rival, sports, competitive, coefficient) |
| exuberant(adjective, strong, tough, intense, energetic) |
| fibrous(strong, thin, vigorous, sturdy, robust) |
| firm(strong, sound, tough, fit, solid) |
| fit as fiddle(expression, idiom, strong, tough, fit) |
| fixed(adjective, strong, sound, tough, solid) |
| fleet |
| forceful(adjective, strong, sound, tough, solid) |
| forcible(adjective, strong, sound, tough, solid) |
| frisky |
| full-bodied(strong, tough, fit, healthy, well) |
| full of life(expression, strong, tough, fit, fresh) |
| gigantic |
| great(adjective, person, body) |
| gymnastics(amusement, contention) |