sales rep vs salesperson

sales rep and salesperson both are nouns.

Word	Noun	Adjective	Verb	Adverb
sales rep	Yes	No	No	No
salesperson	Yes	No	No	No

As nouns, sales rep and salesperson are synonyms defined as:

sales rep and salesperson: a person employed to represent a business and to sell its merchandise (as to customers in a store or to customers who are visited)

Other synonyms of sales rep include sales representative.

sales rep (noun)	salesperson (noun)
a person employed to represent a business and to sell its merchandise (as to customers in a store or to customers who are visited)	a person employed to represent a business and to sell its merchandise (as to customers in a store or to customers who are visited)