powerbroker vs power broker

powerbroker and power broker both are nouns.

Word	Noun	Adjective	Verb	Adverb
powerbroker	Yes	No	No	No
power broker	Yes	No	No	No

As nouns, powerbroker and power broker are synonyms defined as:

powerbroker and power broker: a person who is important by virtue of the people or votes they control

powerbroker (noun)	power broker (noun)
a person who is important by virtue of the people or votes they control	a person who is important by virtue of the people or votes they control