dressing station vs aid station

dressing station and aid station both are nouns.

Word	Noun	Adjective	Verb	Adverb
dressing station	Yes	No	No	No
aid station	Yes	No	No	No

As nouns, dressing station and aid station are synonyms defined as:

dressing station and aid station: (military) a station located near a combat area for giving first aid to the wounded

dressing station (noun)	aid station (noun)
(military) a station located near a combat area for giving first aid to the wounded	(military) a station located near a combat area for giving first aid to the wounded