The Collaborative International Dictionary of English v.0.48:

bulging \bulging\ adj.
   1. curving or bulging outward. Opposite of concave.
      [Narrower terms: biconvex, convexo-convex, lenticular,
      lentiform; broken-backed, hogged; convexo-concave;
      gibbous, gibbose; planoconvex] Also See: protrusive.

   Syn: convex.
        [WordNet 1.5]

   2. curving outward.

   Syn: bellied, bellying, bulbous, bulgy, protuberant.
        [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

Bulge \Bulge\, v. i. [imp. & p. p. Bulged; p. pr. & vb. n.
   Bulging.]
   1. To swell or jut out; to bend outward, as a wall when it
      yields to pressure; to be protuberant; as, the wall
      bulges.
      [1913 Webster]

   2. To bilge, as a ship; to founder.
      [1913 Webster]

            And scattered navies bulge on distant shores.
                                                  --Broome.
      [1913 Webster]

WordNet (r) 3.0 (2006):

bulging
    adj 1: curving or bulging outward [syn: convex, bulging]
           [ant: concave]
    2: curving outward [syn: bellied, bellying, bulbous,
       bulging, bulgy, protuberant]

Moby Thesaurus II by Grady Ward, 1.0:

63 Moby Thesaurus words for "bulging":
   SRO, bagging, baggy, ballooning, bellied, bellying, bellylike,
   billowing, billowy, bloated, bosomy, brimful, brimming, bulbose,
   bulbous, bumped, bumpy, bunched, bunchy, bursting, capacity,
   chock-full, chuck-full, congested, convex, cram-full, crammed,
   distended, farci, filled, flush, full, full to bursting, hillocky,
   hummocky, jam-packed, moutonnee, overfull, overstuffed, packed,
   packed like sardines, plenary, pneumatic, potbellied, pouching,
   ready to burst, replete, rotund, round, rounded, rounded out,
   satiated, saturated, soaked, standing room only, stuffed,
   surfeited, swelling, swollen, topful, verrucated, verrucose,
   warty