pom-pom vs flak

pom-pom and flak both are nouns.

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

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

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

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