announcement vs announce

announcement is a noun but announce is not a noun.

Word	Noun	Adjective	Verb	Adverb
announcement	Yes	No	No	No
announce	No	No	Yes	No

announcement (noun)	announce (noun)
a public statement containing information about an event that has happened or is going to happen
a formal public statement

announcement (verb)	announce (verb)
	make known; make an announcement
	foreshadow or presage
	announce publicly or officially
	give the names of