battle sight vs battlesight

battle sight and battlesight both are nouns.

Word	Noun	Adjective	Verb	Adverb
battle sight	Yes	No	No	No
battlesight	Yes	No	No	No

As nouns, battle sight and battlesight are synonyms defined as:

battle sight and battlesight: an arrangement of sights that makes possible the rapid aiming of a firearm at short ranges

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