long distance vs phone call

long distance and phone call both are nouns.

Word	Noun	Adjective	Verb	Adverb
long distance	Yes	No	No	No
phone call	Yes	No	No	No

As nouns, phone call is a hypernym of long distance; that is, phone call is a word with a broader meaning than long distance:

Other hypernyms of long distance include call, telephone call.

long distance (noun)	phone call (noun)
a telephone call made outside the local calling area	a method of contacting a person by phone