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, dyadWordNet sense 2 (a connection (like a clamp or vise) between two things so they move together):
couplingWordNet sense 3 (link with or as with a yoke):
linkFrom the ODE community, based on WordNetadd/edit