holy vs sacred

holy is a noun but sacred is not a noun.

Word	Noun	Adjective	Verb	Adverb
holy	Yes	Yes	No	No
sacred	No	Yes	No	No

holy (noun)	sacred (noun)
a sacred place of pilgrimage

holy (adjective)	sacred (adjective)
belonging to or derived from or associated with a divine power	concerned with religion or religious purposes
	(often followed by `to') devoted exclusively to a single use or purpose or person
	made or declared or believed to be holy; devoted to a deity or some religious ceremony or use
	worthy of respect or dedication
	worthy of religious veneration