flying field vs runway

flying field and runway both are nouns.

Word	Noun	Adjective	Verb	Adverb
flying field	Yes	No	No	No
runway	Yes	No	No	No

flying field (noun)	runway (noun)
a place where planes take off and land	a strip of level paved surface where planes can 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