airfield vs landing field

airfield and landing field both are nouns.

Word	Noun	Adjective	Verb	Adverb
airfield	Yes	No	No	No
landing field	Yes	No	No	No

As nouns, airfield and landing field are synonyms defined as:

Other synonyms of airfield include field, flying field.

airfield (noun)	landing field (noun)
a place where planes take off and land	a place where planes take off and land