long haul vs long run

long haul and long run both are nouns.

Word	Noun	Adjective	Verb	Adverb
long haul	Yes	No	No	No
long run	Yes	No	No	No

As nouns, long haul and long run are synonyms defined as:

long haul and long run: a period of time sufficient for factors to work themselves out

long haul (noun)	long run (noun)
a journey over a long distance	a period of time sufficient for factors to work themselves out
a period of time sufficient for factors to work themselves out