flack catcher vs spokesperson

flack catcher and spokesperson both are nouns.

Word	Noun	Adjective	Verb	Adverb
flack catcher	Yes	No	No	No
spokesperson	Yes	No	No	No

As nouns, spokesperson is a hypernym of flack catcher; that is, spokesperson is a word with a broader meaning than flack catcher:

flack catcher: a slick spokesperson who can turn any criticism to the advantage of their employer
spokesperson: an advocate who represents someone else's policy or purpose

Other hypernyms of flack catcher include interpreter, representative, voice.

flack catcher (noun)	spokesperson (noun)
a slick spokesperson who can turn any criticism to the advantage of their employer	an advocate who represents someone else's policy or purpose