barkeep vs employee

barkeep and employee both are nouns.

Word	Noun	Adjective	Verb	Adverb
barkeep	Yes	No	No	No
employee	Yes	No	No	No

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

barkeep (noun)	employee (noun)
an employee who mixes and serves alcoholic drinks at a bar	a worker who is hired to perform a job