run-of-the-mine vs mine run

run-of-the-mine and mine run both are adjectives.

Word	Noun	Adjective	Verb	Adverb
run-of-the-mine	No	Yes	No	No
mine run	No	Yes	No	No

As adjectives, run-of-the-mine and mine run are synonyms defined as:

run-of-the-mine and mine run: not special in any way; lacking distinction

Other synonyms of run-of-the-mine include run-of-the-mill, undistinguished, unexceptional.

run-of-the-mine (adjective)	mine run (adjective)
not special in any way; lacking distinction	not special in any way; lacking distinction