zenith vs empyrean

zenith and empyrean both are nouns.

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

zenith (noun)	empyrean (noun)
the point above the observer that is directly opposite the nadir on the imaginary sphere against which celestial bodies appear to be projected	the apparent surface of the imaginary sphere on which celestial bodies appear to be projected

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