WordNet sense 1 (the relation of corresponding in degree or size or amount):

commensurateness, proportionateness

WordNet sense 2 (a function such that for every element of one set there is a unique element of another set):

map, mapping

WordNet sense 3 ((mathematics) an attribute of a shape or relation; exact reflection of form on opposite sides of a dividing line or plane):

balance, symmetry, symmetricalness

WordNet sense 4 (similarity by virtue of corresponding):

parallelism

WordNet sense 5 (compatibility of observations):

agreement