| untiring(adjective, strong, energetic, lively, determined) |
| enterprising(adjective, strong, keen, intense, energetic) |
| strenuous(adjective, strong, difficult, lively, determined) |
| vigorous(adjective, strong, moving, keen, energetic) |
| painstaking(adjective, activity, difficult, energetic, vigorous) |
| intent(adjective, activity, energetic, enthusiastic, determined) |
| lively(adjective, strong, moving, keen, intense) |
| operose(adjective, work, tedious, labour, hardworking) |
| spirited(adjective, strong, moving, energetic, lively) |
| studious(adjective, thoughtful, serious, attentive, learning) |
| ardent(adjective, strong, energetic, enthusiastic, determined) |
| plodding(adjective, activity, work, perseverance, labour) |
| unflagging(adjective, strong, difficult, energetic, lively) |
| careful(adjective, thoughtful, serious, reliable, thorough) |
| dogged |
| enthusiastic(adjective, moving, keen, intense, energetic) |
| gumptious(adjective, energetic, daring, resourceful, innovative) |
| hustling(adjective, energetic, active, daring, occupied) |
| keen(adjective, strong, intense, energetic, lively) |
| steady(adjective, lively, active, fixed, busy) |