strongman vs performing artist

strongman and performing artist both are nouns.

Word	Noun	Adjective	Verb	Adverb
strongman	Yes	No	No	No
performing artist	Yes	No	No	No

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

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

Other hypernyms of strongman include performer.

strongman (noun)	performing artist (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