announce vs announcement

announce is not a noun while announcement is a noun.

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

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

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