"powerhouses" in the noun sense
1. powerhouse, human dynamo, ball of fire, fireball
a highly energetic and indefatigable person
2. powerhouse
a team considered to be the best of its class
3. power station, power plant, powerhouse
an electrical generating station
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License