vouchsafe vs grant

vouchsafe is not a noun while grant is a noun.

Word	Noun	Adjective	Verb	Adverb
vouchsafe	No	No	Yes	No
grant	Yes	No	Yes	No

As verbs, grant is a hypernym of vouchsafe; that is, grant is a word with a broader meaning than vouchsafe:

Other hypernyms of vouchsafe include allow.

vouchsafe (noun)	grant (noun)
	the act of providing a subsidy
	a right or privilege that has been granted
	a contract granting the right to operate a subsidiary business
	any monetary aid
	(law) a transfer of property by deed of conveyance

vouchsafe (verb)	grant (verb)
grant in a condescending manner	be willing to concede
	allow to have
	let have
	transfer by deed
	give as judged due or on the basis of merit
	give over; surrender or relinquish to the physical control of another
	bestow, especially officially