The Collaborative International Dictionary of English v.0.48:

Sirupy \Sir"up*y\, Syrupy \Syr"up*y\, a.
   Like sirup, or partaking of its qualities. --Mortimer.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Syrup \Syr"up\, n., Syrupy \Syr"up*y\, a. [See Sirup.]
   Same as Sirup, Sirupy.
   [1913 Webster]

WordNet (r) 3.0 (2006):

syrupy
    adj 1: overly sweet [syn: cloying, saccharine, syrupy,
           treacly]
    2: having a relatively high resistance to flow [syn: syrupy,
       viscous]
    3: with honey added [syn: honeyed, honied, syrupy]

Moby Thesaurus II by Grady Ward, 1.0:

76 Moby Thesaurus words for "syrupy":
   adhesive, ambrosial, amylaceous, bittersweet, candied, clabbered,
   clammy, clotted, coagulated, curdled, doughy, drippy, gaumy,
   gelatinous, glairy, gluelike, gluey, glutenous, glutinose,
   glutinous, gooey, grumous, gumbo, gumbolike, gumlike, gummous,
   gummy, heavy, honeyed, honeysweet, inspissated, jelled, jellied,
   jellylike, maudlin, melliferous, mellifluent, mellifluous, moist,
   mucilaginous, mushy, nectareous, nectarous, pasty, ropy,
   sacchariferous, sappy, slabby, slimy, slithery, slushy, sour-sweet,
   starchy, sticky, stodgy, stringy, sugarcoated, sugared, sugarsweet,
   sugary, sweet, sweet and pungent, sweet and sour, sweet as sugar,
   sweetened, sweetish, tacky, tenacious, thick, thickened, tough,
   tremelloid, tremellose, viscid, viscose, viscous