peas in a pod

Bobbsey twins close friends compadres comrades couple friends matching set pair two minds thinking as one two of a kind

Doppelganger analogue complement copy correlate correlative correspondent ditto duplicate equal equivalent fellow like mate ringer supplement tally twin

carbon copy dead ringer look alike obverse pendant spit and image spitting image two of a kind

opposite

affinity closeness coincidence comparison kinship parallel

Xerox alikeness analogy carbon clone comparability conformity counterpart double facsimile image likeness look-alike parity ringer sameness semblance simile similitude

birds of a feather carbon copy like of spitting image two of a kind

difference divergence

disagreement dissimilarity unlikeness

contrast dissimililarity diversity

affinity analogy closeness coincidence comparison connection correlation harmony kinship parallel relationship resemblance sameness

agreement alikeness approximation association collation community comparability concordance concurrence conformity congruence congruity homogeneity identity interrelation look-alike parallelism parity proportion reciprocity relation semblance simile similitude synonymity

dead ringer likes of two of a kind

clash difference disagreement disconnection dissimilarity divergence imbalance

opposition

unlikeness