vow vs swear

vow is a noun but swear is not a noun.

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

As verbs, swear is a hyponym of vow; that is, swear is a word with a more specific, narrower meaning than vow:

Other hyponyms of vow include affiance, betroth, engage, plight, profess.

vow (noun)	swear (noun)
a solemn pledge (to oneself or to another or to a deity) to do something or to behave in a certain manner

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