fire-swallower vs performer

fire-swallower and performer both are nouns.

Word	Noun	Adjective	Verb	Adverb
fire-swallower	Yes	No	No	No
performer	Yes	No	No	No

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

fire-swallower: a performer who pretends to swallow fire
performer: an entertainer who performs a dramatic or musical work for an audience

Other hypernyms of fire-swallower include performing artist.

fire-swallower (noun)	performer (noun)
a performer who pretends to swallow fire	an entertainer who performs a dramatic or musical work for an audience