long-distance vs long distance

long-distance is not a noun while long distance is a noun.

Word	Noun	Adjective	Verb	Adverb
long-distance	No	Yes	No	No
long distance	Yes	No	No	No

long-distance (noun)	long distance (noun)
	a telephone call made outside the local calling area

long-distance (adjective)	long distance (adjective)
of or relating to or being a long-distance telephone call
covering a long distance