swear vs swearing

swear is not a noun while swearing is a noun.

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

swear (noun)	swearing (noun)
	a commitment to tell the truth (especially in a court of law); to lie under oath is to become subject to prosecution for perjury
	profane or obscene expression usually of surprise or anger

swear (verb)	swearing (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