customer's broker vs customer's man

customer's broker and customer's man both are nouns.

Word	Noun	Adjective	Verb	Adverb
customer's broker	Yes	No	No	No
customer's man	Yes	No	No	No

As nouns, customer's broker and customer's man are synonyms defined as:

customer's broker and customer's man: someone in charge of a client's account for an advertising agency or brokerage or other service business

Other synonyms of customer's broker include account executive, account representative, registered representative.

customer's broker (noun)	customer's man (noun)
someone in charge of a client's account for an advertising agency or brokerage or other service business	someone in charge of a client's account for an advertising agency or brokerage or other service business