THESAURUS
Polarity
Janus, N pole, S pole, ambiguity, ambivalence, antagonism, anteposition, antipathy, antithesis, balance, biformity, bifurcation, bilateral symmetry, clashing, collision, conflict, conformity, confrontation, confrontment, congruity, conjugation, consistency, contention, contradiction, contradistinction, contraindication, contraposition, contrariety, contrast, correspondence, counterposition, cross-purposes, dichotomy, disagreement, discrepancy, doubleness, doublethink, doubling, dualism, duality, duplexity, duplication, duplicity, dynamic symmetry, equality, equilibrium, equivocality, eurythmics, eurythmy, evenness, finish, halving, harmony, hostility, inconsistency, inimicalness, irony, keeping, magnetic axis, magnetic pole, multilateral symmetry, negative pole, north pole, opposing, oppositeness, opposition, opposure, oppugnance, oppugnancy, pairing, parallelism, perversity, polar opposition, polarization, pole, posing against, positive pole, proportion, proportionality, regularity, repugnance, shapeliness, showdown, south pole, symmetricalness, symmetry, trilateral symmetry, twinning, two-facedness, twoness, uniformity
ROGET THESAURUS
Polarity
Duality
N
duality, dualism, duplicity, biplicity, biformity, polarity, two, deuce, couple, duet, brace, pair, cheeks, twins, Castor and Pollux, gemini, Siamese twins, fellows, yoke, conjugation, dispermy, doublets, dyad, span, two, twin, dual, dualistic, double, binary, binomial, twin, biparous, dyadic, conduplicate, duplex, biduous, binate, diphyletic, dispermic, unijugate, tete-a-tete, coupled, conjugate, both, both the one and the other.
Counteraction
N
counteraction, opposition, contrariety, antagonism, polarity, clashing, collision, interference, inhibition, resistance, renitency, friction, reaction, retroaction, counterblast, neutralization, vis inertiae, check, voluntary opposition &c, voluntary resistance, repression, opposites, action and reaction, yang and yin, yang-yin (contrariety), counteracting, antagonistic, conflicting, retroactive, renitent, reactionary, contrary, although, in spite of, against, for every action there is a reaction, equal in force and opposite in direction.
Contraposition
N
contraposition, opposition, polarity, inversion, opposite side, reverse, inverse, counterpart, antipodes, opposite poles, North and South, antonym, opposite (contrariety), opposite, reverse, inverse, converse, antipodal, subcontrary, fronting, facing, diametrically opposite, Northern, septentrional, Boreal, arctic, Southern, Austral, antarctic, over, over the way, over against, against, face to face, vis-a- vis, as poles asunder.