astronomy vs meteor

astronomy and meteor both are nouns.

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

astronomy (noun)	meteor (noun)
the branch of physics that studies celestial bodies and the universe as a whole	(astronomy) any of the small solid extraterrestrial bodies that hits the earth's atmosphere
	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