WordNet (r) 3.0 (2006):

gooey
    adj 1: soft and sticky [syn: gooey, icky]

Moby Thesaurus II by Grady Ward, 1.0:

76 Moby Thesaurus words for "gooey":
   adhesive, amylaceous, bathetic, beery, clabbered, clammy, clotted,
   cloying, coagulated, curdled, doughy, drippy, gaumy, gelatinous,
   glairy, gluelike, gluey, glutenous, glutinose, glutinous, grumous,
   gumbo, gumbolike, gumlike, gummous, gummy, gushing, heavy,
   inspissated, jelled, jellied, jellylike, maudlin, mawkish,
   mucilaginous, mushy, namby-pamby, nostalgic, nostomanic,
   oversentimental, oversentimentalized, pasty, romantic, ropy,
   saccharine, sappy, sentimental, sentimentalized, slabby, slimy,
   slithery, sloppy, slushy, soft, soppy, soupy, starchy, sticky,
   stodgy, stringy, sugary, sweet, syrupy, tacky, tear-jerking, teary,
   tenacious, thick, thickened, tough, tremelloid, tremellose,
   unctuous, viscid, viscose, viscous