the position or relation of parallels.

agreement in direction, tendency, or character; the state or condition of being parallel.

a parallel or comparison.

Metaphysics . the doctrine that mental and bodily processes are concomitant, each varying with variation of the other, but that there is no causal relation of interaction between the two.

noun

affinity , alikeness , analogy , comparison , correspondence , resemblance , similarity , similitude , uniformity , uniformness