sacred vs unutterable

sacred and unutterable both are adjectives.

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

sacred (adjective)	unutterable (adjective)
concerned with religion or religious purposes	defying expression or description
(often followed by `to') devoted exclusively to a single use or purpose or person	too sacred to be uttered
made or declared or believed to be holy; devoted to a deity or some religious ceremony or use	very difficult to pronounce correctly
worthy of respect or dedication
worthy of religious veneration