sales rep vs employee

sales rep and employee both are nouns.

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

As nouns, employee is a hypernym of sales rep; that is, employee is a word with a broader meaning than sales rep:

sales rep: a person employed to represent a business and to sell its merchandise (as to customers in a store or to customers who are visited)
employee: a worker who is hired to perform a job

sales rep (noun)	employee (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 worker who is hired to perform a job