[syn: greasy, oily]
The Collaborative International Dictionary of English v.0.48:
Oily \Oil"y\, a. [Compar. Oilier; superl. Oiliest.]
   1. Consisting of oil; containing oil; having the nature or
      qualities of oil; unctuous; oleaginous; as, oily matter or
      substance. --Bacon.
      [1913 Webster]
   2. Covered with oil; greasy; hence, resembling oil; as, an
      oily appearance.
      [1913 Webster]
   3. Smoothly subservient; supple; compliant; plausible;
      insinuating. "This oily rascal." --Shak.
      [1913 Webster]
            His oily compliance in all alterations. --Fuller.
      [1913 Webster]
   Oily grain (Bot.), the sesame.
   Oily palm, the oil palm.
      [1913 Webster]
WordNet (r) 3.0 (2006):
oily
    adj 1: containing an unusual amount of grease or oil; "greasy
           hamburgers"; "oily fried potatoes"; "oleaginous seeds"
           [syn: greasy, oily, sebaceous, oleaginous]
    2: unpleasantly and excessively suave or ingratiating in manner
       or speech; "buttery praise"; "gave him a fulsome
       introduction"; "an oily sycophantic press agent"; "oleaginous
       hypocrisy"; "smarmy self-importance"; "the unctuous Uriah
       Heep"; "soapy compliments" [syn: buttery, fulsome,
       oily, oleaginous, smarmy, soapy, unctuous]
    3: coated or covered with oil; "oily puddles in the streets"
    4: smeared or soiled with grease or oil; "greasy coveralls";
       "get rid of rubbish and oily rags" [syn: greasy, oily]
Moby Thesaurus II by Grady Ward, 1.0:
86 Moby Thesaurus words for "oily":
   Pecksniffian, adipose, adulatory, bland, blandishing, blarneying,
   blubbery, buttery, butyraceous, cajoling, canting, chrismal,
   chrismatory, complimentary, courtierly, courtly, disarming,
   fair-spoken, fat, fatty, fawning, fine-spoken, flattering, fulsome,
   glib, goody-goody, greased, greasy, gushing, holier-than-thou,
   honey-mouthed, honey-tongued, honeyed, hypocritic, hypocritical,
   ingratiating, insincere, insinuating, lardaceous, lardy, lubric,
   lubricated, lubricious, mealymouthed, mucoid, obsequious, oiled,
   oily-tongued, oleaginous, oleic, pharisaic, pharisean, rich,
   sanctimonious, sebaceous, servile, simon-pure, sleek, slick,
   sliddery, slimy, slippery, slippy, slithery, slobbery, smarmy,
   smooth, smooth-spoken, smooth-tongued, smug, soaped, soapy,
   soft-soaping, soft-spoken, sophisticated, suave, suave-spoken,
   suety, sycophantic, tallowy, unctuous, unguent, unguentary,
   unguentous, urbane, wheedling