mated

identical

like similar

Xerox akin allied analogous approximate associated carbon copy cognate comparable concurrent correspondent corresponding dead ringer ditto double duplicate equal equivalent even facsimile indistinguishable kindred look-alike matched matching parallel proportionate related resembling same same difference spitting image undifferentiated uniform

different dissimilar unlike

distinct diverse opposite

integral interdependent reciprocal

correlative correspondent equivalent fellow parallel

commutual complemental completing completory conclusive corresponding crowning integrative interconnected interrelated interrelating matched paired

different dissimilar

independent unrelated

espoused joined marital united

joined in holy matrimony

separated

single unmarried unwedded

balanced coordinated paired

equated evened harmonized

alike comparable equivalent similar

different mismatched unequal unlike

dichotomized double

binary

identical

agnate consonant correspondent ditto double equal like parallel same treadmill undifferentiated

akin analogous comparable consistent monotonous same difference selfsame similar unvaried

different dissimilar inconsistent unlike variable

changing deviating divergent unalike varied