holy of holies vs sacredness

holy of holies and sacredness both are nouns.

Word	Noun	Adjective	Verb	Adverb
holy of holies	Yes	No	No	No
sacredness	Yes	No	No	No

As nouns, sacredness is a hypernym of holy of holies; that is, sacredness is a word with a broader meaning than holy of holies:

holy of holies (noun)	sacredness (noun)
(Judaism) sanctuary comprised of the innermost chamber of the Tabernacle in the temple of Solomon where the Ark of the Covenant was kept	the quality of being sacred
(figurative) something regarded as sacred or inviolable