hangar vs airdock

hangar and airdock both are nouns.

Word	Noun	Adjective	Verb	Adverb
hangar	Yes	No	No	No
airdock	Yes	No	No	No

As nouns, hangar and airdock are synonyms defined as:

hangar and airdock: a large structure at an airport where aircraft can be stored and maintained

Other synonyms of hangar include repair shed.

hangar (noun)	airdock (noun)
a large structure at an airport where aircraft can be stored and maintained	a large structure at an airport where aircraft can be stored and maintained