run-of-the-mine vs unexceptional

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

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

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

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

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

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