strongman vs performer

strongman and performer both are nouns.

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

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

strongman: a man who performs feats of strength at a fair or circus
performer: an entertainer who performs a dramatic or musical work for an audience

Other hypernyms of strongman include performing artist.

strongman (noun)	performer (noun)
a powerful political figure who rules by the exercise of force or violence	an entertainer who performs a dramatic or musical work for an audience
a man who performs feats of strength at a fair or circus