the state of being similar; likeness; resemblance.

an aspect, trait, or feature like or resembling another or another's

a similarity of diction.

noun

difference , dissimilarity , opposition , unlikeness

noun

affinity , agreement , alikeness , analogy , approximation , association , closeness , coincidence , collation , community , comparability , comparison , concordance , concurrence , conformity , congruence , congruity , connection , correlation , dead ringer * , harmony , homogeneity , identity , interrelation , kinship , likes of , look-alike , parallel , parallelism , parity , peas in a pod , proportion , reciprocity , relation , relationship , resemblance , sameness , semblance , simile , similitude , synonymity , two of a kind , correspondence , uniformity , uniformness , likeness