The Collaborative International Dictionary of English v.0.48:

Tip \Tip\, v. t. [imp. & p. p. Tipped; p. pr. & vb. n.
   Tipping.]
   To form a point upon; to cover the tip, top, or end of; as,
   to tip anything with gold or silver.
   [1913 Webster]

         With truncheon tipped with iron head.    --Hudibras.
   [1913 Webster]

         Tipped with jet,
         Fair ermines spotless as the snows they press.
                                                  --Thomson.
   [1913 Webster]

WordNet (r) 3.0 (2006):

tipped
    adj 1: having a tip; or having a tip as specified (used in
           combination); "a rubber-tipped cane" [ant: untipped]
    2: departing or being caused to depart from the true vertical or
       horizontal; "the leaning tower of Pisa"; "the headstones were
       tilted" [syn: atilt, canted, leaning, tilted,
       tipped]

Moby Thesaurus II by Grady Ward, 1.0:

44 Moby Thesaurus words for "tipped":
   aslant, aslope, atilt, bevel, beveled, bias, biased, canting,
   capped, careening, crested, crowned, headed, inclinational,
   inclinatory, inclined, inclining, leaning, listing, oblique,
   out of plumb, out of square, peaked, pitched, pitching, plumed,
   raking, recumbent, shelving, shelvy, sideling, sidelong, slant,
   slanted, slanting, slantways, slantwise, sloped, sloping, tilted,
   tilting, tipping, tipsy, topped