telescope sight vs gunsight

telescope sight and gunsight both are nouns.

Word	Noun	Adjective	Verb	Adverb
telescope sight	Yes	No	No	No
gunsight	Yes	No	No	No

As nouns, gunsight is a hypernym of telescope sight; that is, gunsight 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
gunsight: a sight used for aiming a gun

Other hypernyms of telescope sight include gun-sight.

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