flack catcher vs interpreter

flack catcher and interpreter both are nouns.

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

As nouns, interpreter is a hypernym of flack catcher; that is, interpreter 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
interpreter: an advocate who represents someone else's policy or purpose

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

flack catcher (noun)	interpreter (noun)
a slick spokesperson who can turn any criticism to the advantage of their employer	(computer science) a program that translates and executes source language statements one line at a time
	an advocate who represents someone else's policy or purpose
	someone who mediates between speakers of different languages
	someone who uses art to represent something