anticlimax vs anticlimactic

anticlimax is a noun but anticlimactic is not a noun.

Word	Noun	Adjective	Verb	Adverb
anticlimax	Yes	No	No	No
anticlimactic	No	Yes	No	No

anticlimax (noun)	anticlimactic (noun)
a change from a serious subject to a disappointing one
a disappointing decline after a previous rise

anticlimax (adjective)	anticlimactic (adjective)
	coming after the climax especially of a dramatic or narrative plot
	of or relating to a sudden change from an impressive to a ludicrous style