run-of-the-mine vs undistinguished

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

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

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

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

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

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