synonymity

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

dead ringer likes of peas in a pod two of a kind

clash difference disagreement disconnection dissimilarity divergence imbalance

opposition

unlikeness