having strength or power greater than average or expected; "a strong radio signal"; "strong medicine"; "a strong man"
11
energetic
possessing or exerting or displaying energy; "an energetic fund raiser for the college"; "an energetic group of hikers"
4
agile
moving quickly and lightly; "sleek and agile as a gymnast"; "as nimble as a deer"; "nimble fingers"; "quick of foot"; "the old dog was so spry it was halfway up the stairs before we could stop it"
1
fast
acting or moving or capable of acting or moving quickly; "fast film"; "on the fast track in school"; "set a fast pace"; "a fast car"