uneven vs mismatched

uneven and mismatched both are adjectives.

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

As adjectives, uneven and mismatched are synonyms defined as:

uneven and mismatched: (of a contest or contestants) not fairly matched as opponents

uneven (adjective)	mismatched (adjective)
not even or uniform as e.g. in shape or texture	either not matched or unsuitably matched
not divisible by two	(of a contest or contestants) not fairly matched as opponents
lacking consistency
(of a contest or contestants) not fairly matched as opponents
variable and recurring at irregular intervals