solar apex vs empyrean

solar apex and empyrean both are nouns.

Word	Noun	Adjective	Verb	Adverb
solar apex	Yes	No	No	No
empyrean	Yes	Yes	No	No

solar apex (noun)	empyrean (noun)
the point on the celestial sphere toward which the sun and solar system appear to be moving relative to the fixed stars	the apparent surface of the imaginary sphere on which celestial bodies appear to be projected

solar apex (adjective)	empyrean (adjective)
	of or relating to the sky or heavens
	inspiring awe