swing door vs batwing

swing door and batwing both are nouns.

Word	Noun	Adjective	Verb	Adverb
swing door	Yes	No	No	No
batwing	Yes	Yes	No	No

As nouns, batwing is a hyponym of swing door; that is, batwing is a word with a more specific, narrower meaning than swing door:

swing door: a door that swings on a double hinge; opens in either direction
batwing: one of a pair of swinging doors (as at the entrance to a western saloon)

swing door (noun)	batwing (noun)
a door that swings on a double hinge; opens in either direction	one of a pair of swinging doors (as at the entrance to a western saloon)

swing door (adjective)	batwing (adjective)
	formed or shaped like a bat's wing