WordNet (r) 3.0 (2006):

come together
    v 1: come together, as if in an embrace; "Her arms closed around
         her long lost relative" [syn: close, come together]

Moby Thesaurus II by Grady Ward, 1.0:

182 Moby Thesaurus words for "come together":
   add, adhere, affiliate, ally, amalgamate, approach, assemble,
   assimilate, associate, ball, band together, be in cahoots,
   be intimate, blend, bunch, bunch up, cabal, cement a union, center,
   centralize, clinch, close, close in, close up, close with, clot,
   club, club together, cluster, coalesce, cohabit, cohere, collect,
   combine, come round, come to terms, commit adultery, communicate,
   compound, comprise, concenter, concentralize, concentrate,
   confederate, congregate, connect, consociate, consolidate,
   conspire, converge, copulate, couple, cover, crowd, crystallize,
   date, diddle, draw up, embody, embrace, encompass, fall in,
   fall in with, fall into line, fall into place, fall into rank,
   federalize, federate, flock together, flow together, flux,
   forgather, forgive and forget, form, fornicate, frig, funnel, fuse,
   gang, gang around, gang up, gather, gather around, go in partners,
   go in partnership, grow together, hang together, have sex,
   have sexual relations, herd together, hive, hold together,
   hook up with, horde, huddle, include, incorporate, integrate,
   interblend, intercommunicate, interfuse, intersect, join,
   join forces, join fortunes with, join together, join up with,
   join with, knit, lay, league, lie with, link, lump together,
   make it with, make love, make matters up, make one, make out,
   make up, marry, mass, mate, meet, meld, melt into one, merge, mill,
   mix, mount, muster, narrow the gap, nip, organize, pair, pair off,
   partner, pinch, place itself, put together, rally, rally around,
   rally round, range itself, reembody, rendezvous, roll into one,
   run together, screw, seethe, serve, service, shade into,
   shake hands, shape up, sleep with, solidify, stand together,
   stand up with, stream, surge, swarm, syncretize, syndicate,
   synthesize, take form, take its place, take order, take rank,
   take shape, taper, team up with, team with, throng, throw in with,
   tie in with, tie up with, unify, unionize, unite, unite with,
   wed