runway vs airfield

runway and airfield both are nouns.

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

runway (noun)	airfield (noun)
a strip of level paved surface where planes can take off and land	a place where planes take off and land
a narrow platform extending from the stage into the audience in a theater or nightclub etc.
a bar or pair of parallel bars of rolled steel making the railway along which railroad cars or other vehicles can roll
a chute down which logs can slide