celestial equator vs equinoctial

celestial equator and equinoctial both are nouns.

Word	Noun	Adjective	Verb	Adverb
celestial equator	Yes	No	No	No
equinoctial	Yes	Yes	No	No

As nouns, celestial equator and equinoctial are synonyms defined as:

celestial equator and equinoctial: the great circle on the celestial sphere midway between the celestial poles

Other synonyms of celestial equator include equinoctial circle, equinoctial line.

celestial equator (noun)	equinoctial (noun)
the great circle on the celestial sphere midway between the celestial poles	the great circle on the celestial sphere midway between the celestial poles

celestial equator (adjective)	equinoctial (adjective)
	relating to an equinox (when the lengths of night and day are equal)
	relating to the vicinity of the equator