registered representative vs customer's man

registered representative and customer's man both are nouns.

Word	Noun	Adjective	Verb	Adverb
registered representative	Yes	No	No	No
customer's man	Yes	No	No	No

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

registered representative 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 registered representative include account executive, account representative, customer's broker.

registered representative (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