Janus, L, ambiguity, ambivalence, angle, apex, arborescence, arborization, bend, bifidity, biforking, biformity, bight, bipartition, bisection, branching, branching off, by two, cant, chevron, coin, conjugation, corner, crank, crook, crotchet, cutting in two, deflection, dichotomy, dimidiation, divarication, division, dogleg, doubleness, doublethink, doubling, dualism, duality, duplexity, duplication, duplicity, elbow, ell, equivocality, fork, forking, furcation, halving, hook, in half, inflection, irony, knee, nook, pairing, point, polarity, quoin, ramification, subdivision, swerve, treelikeness, trifurcation, twinning, two-facedness, twoness, veer, vertex, zag, zig, zigzag