brokerage vs agent

brokerage and agent both are nouns.

Word	Noun	Adjective	Verb	Adverb
brokerage	Yes	No	No	No
agent	Yes	No	No	No

brokerage (noun)	agent (noun)
place where a broker conducts his business	the semantic role of the animate entity that instigates or causes the happening denoted by the verb in the clause
a stock broker's business; charges a fee to act as intermediary between buyer and seller	an active and efficient cause; capable of producing a certain effect
the business of a broker; charges a fee to arrange a contract between two parties	a businessman who buys or sells for another in exchange for a commission
	a representative who acts on behalf of other persons or organizations
	any agent or representative of a federal agency or bureau
	a substance that exerts some force or effect