flack vs pom-pom

flack and pom-pom both are nouns.

Word	Noun	Adjective	Verb	Adverb
flack	Yes	No	No	No
pom-pom	Yes	No	No	No

As nouns, flack and pom-pom are synonyms defined as:

Other synonyms of flack include ack-ack, ack-ack gun, antiaircraft, antiaircraft gun, flak.

flack (noun)	pom-pom (noun)
artillery designed to shoot upward at airplanes	artillery designed to shoot upward at airplanes
intense adverse criticism	decoration consisting of a ball of tufted wool or silk; usually worn on a hat
a slick spokesperson who can turn any criticism to the advantage of their employer