vow vs engage

vow is a noun but engage is not a noun.

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

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

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

vow (noun)	engage (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)	engage (verb)
make a vow; promise	get caught
dedicate to a deity by a vow	consume all of one's attention or time
	give to in marriage
	keep engaged
	engage for service under a term of contract
	hire for work or assistance
	ask to represent; of legal counsel
	engage or hire for work
	carry out or participate in an activity; be involved in
	carry on (wars, battles, or campaigns)