flak vs spokesperson

flak and spokesperson both are nouns.

Word	Noun	Adjective	Verb	Adverb
flak	Yes	No	No	No
spokesperson	Yes	No	No	No

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

flak: 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 flak include interpreter, representative, voice.

flak (noun)	spokesperson (noun)
artillery designed to shoot upward at airplanes	an advocate who represents someone else's policy or purpose
intense adverse criticism
a slick spokesperson who can turn any criticism to the advantage of their employer