power-house

powerhouse

[pou-er-hous]
noun, plural powerhouses [pou-er-hou-ziz for 1; pou-er-hou-siz for 2 ] .
1.
Electricity. a generating station.
2.
a person, group, team, or the like, having great energy, strength, or potential for success.

Origin:
1880–85; power + house

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
powerhouse (ˈpaʊəˌhaʊs)
 
n
1.  an electrical generating station or plant
2.  informal a forceful or powerful person or thing

Collins English Dictionary - Complete & Unabridged 10th Edition
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