THESAURUS
Two
biform, bifurcated, bilateral, bipartisan, bipartite, both, brace, couple, couplet, dichotomous, distich, double, double harness, doublet, duad, duadic, dual, dualistic, duet, duo, duplex, duplicated, dyad, dyadic, identical, match, matched, mates, pair, set of two, span, team, the two, twain, twin, twinned, two-sided, twosome, yoke
ROGET THESAURUS
Two
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,
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.