swearer vs swear

swearer is a noun but swear is not a noun.

Word	Noun	Adjective	Verb	Adverb
swearer	Yes	No	No	No
swear	No	No	Yes	No

swearer (noun)	swear (noun)
someone who takes a solemn oath
someone who uses profanity

swearer (verb)	swear (verb)
	have faith or confidence in
	make a deposition; declare under oath
	utter obscenities or profanities
	promise solemnly; take an oath
	to declare or affirm solemnly and formally as true