declare vs declarer

declare is not a noun while declarer is a noun.

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

declare (noun)	declarer (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

declare (verb)	declarer (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