gun-sight vs sights

gun-sight and sights both are nouns.

Word	Noun	Adjective	Verb	Adverb
gun-sight	Yes	No	No	No
sights	Yes	No	No	No

As nouns, sights is a hypernym of gun-sight; that is, sights is a word with a broader meaning than gun-sight:

gun-sight: a sight used for aiming a gun
sights: an optical instrument for aiding the eye in aiming, as on a firearm or surveying instrument

gun-sight (noun)	sights (noun)
a sight used for aiming a gun	an optical instrument for aiding the eye in aiming, as on a firearm or surveying instrument