mismatched vs unpaired

mismatched and unpaired both are adjectives.

Word	Noun	Adjective	Verb	Adverb
mismatched	No	Yes	No	No
unpaired	No	Yes	No	No

mismatched (adjective)	unpaired (adjective)
either not matched or unsuitably matched	of the remaining member of a pair
(of a contest or contestants) not fairly matched as opponents