crazy! fast! :P
Vigorous.
cheerful, energetic
vivacious, energetic
tireless, energetic
The dictionary give us active as a synonym for energetic, another says an abundance of energy, yet another gives us aggressive, animated, agile, or alert.
Energetic means having or showing a lot of energy, enthusiasm, and activity.
Synonyms can include strength, health, vitality, hardiness, robustness, or sturdiness. But for people, there is usually a connotation of being energetic, as in energy and enthusiasm.
energetic
energetic, poisonous, dangerous, contaminated
energetic or hyper
The word "dashing" is an adjective that means being energetic and lively.
Live wire :)