declarer vs declare

declarer is a noun but declare is not a noun.

Word	Noun	Adjective	Verb	Adverb
declarer	Yes	No	No	No
declare	No	No	Yes	No

declarer (noun)	declare (noun)
the bridge player in contract bridge who wins the bidding and can declare which suit is to be trumps
someone who claims to speak the truth

declarer (verb)	declare (verb)
	state emphatically and authoritatively
	state firmly
	make a declaration (of dutiable goods) to a customs official
	declare to be
	announce publicly or officially
	proclaim one's support, sympathy, or opinion for or against
	designate (a trump suit or no-trump) with the final bid of a hand
	authorize payments of