sublime vs empyrean

sublime is not a noun while empyrean is a noun.

Word	Noun	Adjective	Verb	Adverb
sublime	No	Yes	Yes	No
empyrean	Yes	Yes	No	No

As adjectives, sublime and empyrean are synonyms defined as:

Other synonyms of sublime include empyreal.

sublime (noun)	empyrean (noun)
	the apparent surface of the imaginary sphere on which celestial bodies appear to be projected

sublime (adjective)	empyrean (adjective)
lifted up or set high	of or relating to the sky or heavens
inspiring awe	inspiring awe
greatest or maximal in degree; extreme
of high moral or intellectual value; elevated in nature or style
worthy of adoration or reverence

sublime (verb)	empyrean (verb)
vaporize and then condense right back again
change or cause to change directly from a solid into a vapor without first melting