telescope sight vs gun-sight

telescope sight and gun-sight both are nouns.

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

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

telescope sight: gunsight consisting of a telescope on a firearm for use as a sight
gun-sight: a sight used for aiming a gun

Other hypernyms of telescope sight include gunsight.

telescope sight (noun)	gun-sight (noun)
gunsight consisting of a telescope on a firearm for use as a sight	a sight used for aiming a gun