powerhouse vs power station

powerhouse and power station both are nouns.

Word	Noun	Adjective	Verb	Adverb
powerhouse	Yes	No	No	No
power station	Yes	No	No	No

As nouns, powerhouse and power station are synonyms defined as:

Other synonyms of powerhouse include power plant.

powerhouse (noun)	power station (noun)
an electrical generating station	an electrical generating station
a team considered to be the best of its class
a highly energetic and indefatigable person