astronomy vs conjunction

astronomy and conjunction both are nouns.

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

astronomy (noun)	conjunction (noun)
the branch of physics that studies celestial bodies and the universe as a whole	something that joins or connects
	the temporal property of two things happening at the same time
	an uninflected function word that serves to conjoin words or phrases or clauses or sentences
	(astronomy) apparent meeting or passing of two or more celestial bodies in the same degree of the zodiac
	the grammatical relation between linguistic units (words or phrases or clauses) that are connected by a conjunction
	the state of being joined together