flak vs predictor

flak and predictor both are nouns.

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

flak (noun)	predictor (noun)
artillery designed to shoot upward at airplanes	a computer for controlling antiaircraft fire that computes the position of an aircraft at the instant of a shell's arrival
intense adverse criticism	information that supports a probabilistic estimate of future events
a slick spokesperson who can turn any criticism to the advantage of their employer	someone who makes predictions of the future (usually on the basis of special knowledge)