assert vs asserter

assert is not a noun while asserter is a noun.

Word	Noun	Adjective	Verb	Adverb
assert	No	No	Yes	No
asserter	Yes	No	No	No

assert (noun)	asserter (noun)
	someone who claims to speak the truth

assert (verb)	asserter (verb)
postulate positively and assertively
to declare or affirm solemnly and formally as true
state categorically
insist on having one's opinions and rights recognized