power station vs powerhouse

power station and powerhouse both are nouns.

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

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

Other synonyms of power station include power plant.

power station (noun)	powerhouse (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