airfield vs apron

airfield and apron both are nouns.

Word	Noun	Adjective	Verb	Adverb
airfield	Yes	No	No	No
apron	Yes	No	No	No

airfield (noun)	apron (noun)
a place where planes take off and land	a garment of cloth or leather or plastic that is tied about the waist and worn to protect your clothing
	a paved surface where aircraft stand while not being used
	the part of a modern theater stage between the curtain and the orchestra (i.e., in front of the curtain)
	(golf) the part of the fairway leading onto the green