powerhouse vs busbar

powerhouse and busbar both are nouns.

Word	Noun	Adjective	Verb	Adverb
powerhouse	Yes	No	No	No
busbar	Yes	No	No	No

powerhouse (noun)	busbar (noun)
an electrical generating station	an electrical conductor that makes a common connection between several circuits
a team considered to be the best of its class
a highly energetic and indefatigable person