equinox vs astronomy

equinox and astronomy both are nouns.

Word	Noun	Adjective	Verb	Adverb
equinox	Yes	No	No	No
astronomy	Yes	No	No	No

equinox (noun)	astronomy (noun)
(astronomy) either of the two celestial points at which the celestial equator intersects the ecliptic	the branch of physics that studies celestial bodies and the universe as a whole
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