narrowbody aircraft vs narrow-body aircraft

narrowbody aircraft and narrow-body aircraft both are nouns.

Word	Noun	Adjective	Verb	Adverb
narrowbody aircraft	Yes	No	No	No
narrow-body aircraft	Yes	No	No	No

As nouns, narrowbody aircraft and narrow-body aircraft are synonyms defined as:

narrowbody aircraft and narrow-body aircraft: a commercial airliner with a single aisle

Other synonyms of narrowbody aircraft include narrow-body.

narrowbody aircraft (noun)	narrow-body aircraft (noun)
a commercial airliner with a single aisle	a commercial airliner with a single aisle