avower

nouns

someone who admits or acknowledges openly and boldly
avower
is derived from
avow
is a type of (narrower)
a person who communicates with others
communicator
someone who claims to speak the truth
"a bold asserter"; "a declarer of his intentions"; "affirmers of traditional doctrine"; "an asseverator of strong convictions"; "an avower of his own great intelligence"
affirmer, asserter, asseverator, avower, declarer
is derived from
avow