battlesight vs gunsight

battlesight and gunsight both are nouns.

Word	Noun	Adjective	Verb	Adverb
battlesight	Yes	No	No	No
gunsight	Yes	No	No	No

As nouns, gunsight is a hypernym of battlesight; that is, gunsight is a word with a broader meaning than battlesight:

battlesight: an arrangement of sights that makes possible the rapid aiming of a firearm at short ranges
gunsight: a sight used for aiming a gun

Other hypernyms of battlesight include gun-sight.

battlesight (noun)	gunsight (noun)
an arrangement of sights that makes possible the rapid aiming of a firearm at short ranges	a sight used for aiming a gun