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Synonyms for Yoke (same or very similar meaning)

WordNet sense 1 (two items of the same kind):
brace, couple, couplet, duet, duo, pair, span, twain, twosome, distich, duad, dyad

WordNet sense 2 (a connection (like a clamp or vise) between two things so they move together):

WordNet sense 3 (link with or as with a yoke):

From the ODE community, based on WordNetadd/edit