hallowed vs sacred

hallowed and sacred both are adjectives.

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

As adjectives, hallowed and sacred are synonyms defined as:

hallowed (adjective)	sacred (adjective)
worthy of religious veneration	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