empyrean vs zenith

empyrean and zenith both are nouns.

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

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

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