"energetic" in the adjective sense
possessing or exerting or displaying energy
"an energetic fund raiser for the college"
"an energetic group of hikers"
"it caused an energetic chemical reaction"
2. energetic, gumptious, industrious, up-and-coming
working hard to promote an enterprise
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License