airstrip vs landing field

airstrip and landing field both are nouns.

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

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

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

airstrip (noun)	landing field (noun)
an airfield without normal airport facilities	a place where planes take off and land