meteor vs astronomy

meteor and astronomy both are nouns.

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

meteor (noun)	astronomy (noun)
(astronomy) any of the small solid extraterrestrial bodies that hits the earth's atmosphere	the branch of physics that studies celestial bodies and the universe as a whole
a streak of light in the sky at night that results when a meteoroid hits the earth's atmosphere and air friction causes the meteoroid to melt or vaporize or explode