powerhouse vs ball of fire

powerhouse and ball of fire both are nouns.

Word	Noun	Adjective	Verb	Adverb
powerhouse	Yes	No	No	No
ball of fire	Yes	No	No	No

As nouns, powerhouse and ball of fire are synonyms defined as:

powerhouse and ball of fire: a highly energetic and indefatigable person

Other synonyms of powerhouse include fireball, human dynamo.

powerhouse (noun)	ball of fire (noun)
an electrical generating station	someone whose career progresses rapidly
a team considered to be the best of its class	a highly energetic and indefatigable person
a highly energetic and indefatigable person