couplement

from The Collaborative International Dictionary of English v.0.48

Couplement \Cou"ple*ment\ (k?p"'l-ment), n. [Cf. OF.
   couplement.]
   Union; combination; a coupling; a pair. [Obs.] --Shak.
   [1913 Webster]

         And forth together rode, a goodly couplement.
                                                  --Spenser.
   [1913 Webster]