airport vs landing field

airport and landing field both are nouns.

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

As nouns, landing field is a hypernym of airport; that is, landing field is a word with a broader meaning than airport:

airport: an airfield equipped with control tower and hangars as well as accommodations for passengers and cargo
landing field: a place where planes take off and land

Other hypernyms of airport include airfield, field, flying field.

airport (noun)	landing field (noun)
an airfield equipped with control tower and hangars as well as accommodations for passengers and cargo	a place where planes take off and land