tabu vs sacred

tabu is a noun but sacred is not a noun.

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

tabu (noun)	sacred (noun)
an inhibition or ban resulting from social custom or emotional aversion
a prejudice (especially in Polynesia and other South Pacific islands) that prohibits the use or mention of something because of its sacred nature

tabu (adjective)	sacred (adjective)
excluded from use or mention	concerned with religion or religious purposes
forbidden to profane use especially in South Pacific islands	(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