What is another word for "polarity"?

Roget's Thesaurus (1911) lists these synonyms for "polarity": action, against, although, and, antagonism, antagonistic, antagonize, antarctic, antipodal, antipodes, antonym, arctic, asunder, beat, biformity, binary, binate, binomial, biparous, biplicity, block, both, brace, bracket, check, clash, collision, compensate, compensation, conduplicate, conflict, conflicting, conjugate, conjugation, contraposition, contrariety, contrary, contravene, converse, counter.