The Collaborative International Dictionary of English v.0.48:

Congeal \Con*geal"\, v. t. [imp. & p. p. Congealed; p. pr. &
   vb. n. Congealing.] [F. congeler, L. congelare, -gelatumn;
   con- + gelare to freeze, gelu frost. See Gelid.]
   1. To change from a fluid to a solid state by cold; to
      freeze.

   Syn: jell, set.
        [1913 Webster]

              A vapory deluge lies to snow congealed. --Thomson.
        [1913 Webster]

   2. To affect as if by freezing; to check the flow of, or
      cause to run cold; to chill.
      [1913 Webster]

            As if with horror to congeal his blood. --Stirling.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

congealed \congealed\ adj.
   solidified; as, congealed into jelly.

   Syn: jelled, jellied.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

congealed
    adj 1: congealed into jelly; solidified by cooling; "in Georgia
           they serve congealed salads" [syn: congealed, jelled,
           jellied]

Moby Thesaurus II by Grady Ward, 1.0:

31 Moby Thesaurus words for "congealed":
   blast-frozen, caked, cakey, clabbered, clotted, coagulated, curded,
   curdled, frostbitten, frostnipped, frozen, frozen solid,
   gelatinized, gelid, glacial, grumous, ice, ice-cold, icelike, icy,
   icy-cold, incrassate, inspissate, inspissated, jelled, jellied,
   lumpish, lumpy, quick-frozen, sharp-frozen, thickened