geek vs performer

geek and performer both are nouns.

Word	Noun	Adjective	Verb	Adverb
geek	Yes	No	Yes	No
performer	Yes	No	No	No

As nouns, performer is a hypernym of geek; that is, performer is a word with a broader meaning than geek:

geek: a carnival performer who does disgusting acts
performer: an entertainer who performs a dramatic or musical work for an audience

Other hypernyms of geek include performing artist.

geek (noun)	performer (noun)
a person with an unusual or odd personality	an entertainer who performs a dramatic or musical work for an audience
a carnival performer who does disgusting acts

geek (verb)	performer (verb)
to be intoxicated