powerhouse

noun

1. A power station; the building housing a power station

   “The new powerhouse comprised two tube turbines with a total capacity of 4,500 kW under 18.3 feet head.”

2. (figuratively)Any source of power, energy or strength; a source of influence or inspiration

   “The company has been a powerhouse in its industry for many years.”

   “The mitochondrion is the powerhouse of the cell.”

   “She's a powerhouse of ideas.”

   “The Soviet Union often led the world in the Olympics during the Cold War, and East Germany was an Olympic powerhouse — though athletes from both are now believed to have been systematically and massively doped[…]”

   “While the California economy maintains its powerhouse status, outranking even those of most countries, the state’s most-powerful sectors — including tech companies and supply chain logistics — have struggled to keep their footing, pummeled by high interest rates, investor skittishness, labor strife and other turmoil.”

3. A very good hand of cards, likely to win.

   “A hand like A-2-3-4 is a powerhouse in Omaha/8, because it can easily make the best low hand and capture half the pot.”