The Collaborative International Dictionary of English v.0.48:

Thring \Thring\, v. t. & i. [imp. Throng.] [AS. [thorn]ringan.
   See Throng.]
   To press, crowd, or throng. [Obs.] --Chaucer.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Throng \Throng\, n. [OE. [thorn]rong, [thorn]rang, AS.
   ge[thorn]rang, fr. [thorn]ringan to crowd, to press; akin to
   OS. thringan, D. & G. dringen, OHG. dringan, Icel.
   [thorn]ryngva, [thorn]r["o]ngva, Goth. [thorn]riehan, D. & G.
   drang a throng, press, Icel. [thorn]r["o]ng a throng, Lith.
   trenkti to jolt, tranksmas a tumult. Cf. Thring.]
   1. A multitude of persons or of living beings pressing or
      pressed into a close body or assemblage; a crowd.
      [1913 Webster]

   2. A great multitude; as, the heavenly throng.
      [1913 Webster]

   Syn: Throng, Multitude, Crowd.

   Usage: Any great number of persons form a multitude; a throng
          is a large number of persons who are gathered or are
          moving together in a collective body; a crowd is
          composed of a large or small number of persons who
          press together so as to bring their bodies into
          immediate or inconvenient contact. A dispersed
          multitude; the throngs in the streets of a city; the
          crowd at a fair or a street fight. But these
          distinctions are not carefully observed.
          [1913 Webster]

                So, with this bold opposer rushes on
                This many-headed monster, multitude. --Daniel.
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                Not to know me argues yourselves unknown,
                The lowest of your throng.        --Milton.
          [1913 Webster]

                I come from empty noise, and tasteless pomp,
                From crowds that hide a monarch from himself.
                                                  --Johnson.
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The Collaborative International Dictionary of English v.0.48:

Throng \Throng\, v. t.
   1. To crowd, or press, as persons; to oppress or annoy with a
      crowd of living beings.
      [1913 Webster]

            Much people followed him, and thronged him. --Mark
                                                  v. 24.
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   2. To crowd into; to fill closely by crowding or pressing
      into, as a hall or a street. --Shak.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Throng \Throng\, a.
   Thronged; crowded; also, much occupied; busy. [Obs. or Prov.
   Eng.] --Bp. Sanderson.
   [1913 Webster]

         To the intent the sick . . . should not lie too throng.
                                                  --Robynson
                                                  (More's
                                                  Utopia).
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Throng \Throng\, v. i. [imp. & p. p. Thronged; p. pr. & vb. n.
   Thronging.]
   To crowd together; to press together into a close body, as a
   multitude of persons; to gather or move in multitudes.
   [1913 Webster]

         I have seen the dumb men throng to see him. --Shak.
   [1913 Webster]

WordNet (r) 3.0 (2006):

throng
    n 1: a large gathering of people [syn: multitude, throng,
         concourse]
    v 1: press tightly together or cram; "The crowd packed the
         auditorium" [syn: throng, mob, pack, pile, jam]

Moby Thesaurus II by Grady Ward, 1.0:

108 Moby Thesaurus words for "throng":
   a mass of, a world of, abound with, army, assemblage, assemble,
   assembly, be alive with, bevy, bristle with, bunch, bunch up,
   burst with, clot, cloud, cluster, clutter, cohue, collect,
   collection, come together, congregate, congregation, converge,
   copulate, couple, covey, crawl with, creep with, crowd, crush,
   date, deluge, drove, fill, flight, flock, flock to, flock together,
   flocks, flood, flow together, forgather, fuse, galaxy, gang around,
   gang up, gather, gather around, gather in, gathering, group, hail,
   heap, herd, herd together, hive, horde, host, huddle, jam,
   large amount, league, legion, link, lots, many, mass, masses of,
   meet, merge, mill, mob, muchness, multiply, multitude, muster,
   nest, numbers, overflow with, pack, panoply, plurality, press,
   pullulate with, push, quantities, quite a few, rabble, rally,
   rally around, rendezvous, rout, ruck, scores, seethe, shoal, spate,
   squash, stream, surge, swarm, swarm with, teem with, throng with,
   tidy sum, unite, worlds of