equinox vs celestial point

equinox and celestial point both are nouns.

Word	Noun	Adjective	Verb	Adverb
equinox	Yes	No	No	No
celestial point	Yes	No	No	No

As nouns, celestial point is a hypernym of equinox; that is, celestial point is a word with a broader meaning than equinox:

equinox: (astronomy) either of the two celestial points at which the celestial equator intersects the ecliptic
celestial point: a point in the heavens (on the celestial sphere)

equinox (noun)	celestial point (noun)
(astronomy) either of the two celestial points at which the celestial equator intersects the ecliptic	a point in the heavens (on the celestial sphere)
either of two times of the year when the sun crosses the plane of the earth's equator and day and night are of equal length