mixologist vs bartender

mixologist and bartender both are nouns.

Word	Noun	Adjective	Verb	Adverb
mixologist	Yes	No	No	No
bartender	Yes	No	No	No

As nouns, mixologist and bartender are synonyms defined as:

mixologist and bartender: an employee who mixes and serves alcoholic drinks at a bar

Other synonyms of mixologist include barkeep, barkeeper.

mixologist (noun)	bartender (noun)
an employee who mixes and serves alcoholic drinks at a bar	an employee who mixes and serves alcoholic drinks at a bar