The Collaborative International Dictionary of English v.0.48:

Associated \As*so"ci*a`ted\, a.
   Joined as a companion; brought into association;
   accompanying; combined.
   [1913 Webster]

   Associated movements (Physiol.), consensual movements which
      accompany voluntary efforts without our consciousness.
      --Dunglison.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Associate \As*so"ci*ate\, v. t. [imp. & p. p. Associated; p.
   pr. & vb. n. Associating.] [L. associatus, p. p. of
   associare; ad + sociare to join or unite, socius companion.
   See Social.]
   1. To join with one, as a friend, companion, partner, or
      confederate; as, to associate others with us in business,
      or in an enterprise.
      [1913 Webster]

   2. To join or connect; to combine in acting; as, particles of
      gold associated with other substances.
      [1913 Webster]

   3. To connect or place together in thought.
      [1913 Webster]

            He succeeded in associating his name inseparably
            with some names which will last as long as our
            language.                             --Macaulay.
      [1913 Webster]

   4. To accompany; to keep company with. [Obs.]
      [1913 Webster]

            Friends should associate friends in grief and woe.
                                                  --Shak.
      [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

119 Moby Thesaurus words for "associated":
   accessory, accompanying, accordant, affiliate, affiliated,
   agreeing, allied, assembled, associate, at one with, attendant,
   attending, banded together, bound, bracketed, cabalistic, coacting,
   coactive, coadunate, coincident, collaborative, collateral,
   collected, collective, collectivistic, collusive, combined,
   combining, common, communal, communistic, commutual, concerted,
   concomitant, concordant, concurrent, concurring, confederate,
   confederated, conjoined, conjoint, conjugate, connected,
   consilient, conspiratorial, cooperant, cooperative, coordinate,
   copulate, corporate, correlated, correlative, coupled, coworking,
   enleagued, federate, federated, fellow, gathered, general,
   hand-in-glove, hand-in-hand, harmonious, implicated, in cahoots,
   in common, in league, in partnership, in with, incorporated,
   integrated, interlinked, interlocked, interrelated, intimate,
   involved, joined, joint, knotted, leagued, linked, married,
   matched, mated, meeting, merged, mutual, of that ilk, of that kind,
   paired, parallel, parasitic, partners with, popular, public,
   reciprocal, related, saprophytic, simultaneous, social,
   socialistic, societal, spliced, symbiotic, synchronous, synergetic,
   synergic, synergistic, teamed, tied, twin, twinned, undivided,
   united, uniting, unseparated, wed, wedded, yoked