The Collaborative International Dictionary of English v.0.48:

Scrabble \Scrab"ble\ (skr[a^]b"b'l), v. i. [imp. & p. p.
   Scrabbled; p. pr. & vb. n. Scrabbling.] [Freq. of scrape.
   Cf. Scramble, Scrawl, v. t.]
   1. To scrape, paw, or scratch with the hands; to proceed by
      clawing with the hands and feet; to scramble; as, to
      scrabble up a cliff or a tree.
      [1913 Webster]

            Now after a while Little-faith came to himself, and
            getting up made shift to scrabble on his way.
                                                  --Bunyan.
      [1913 Webster]

   2. To make irregular, crooked, or unmeaning marks; to
      scribble; to scrawl.
      [1913 Webster]

            David . . . scrabbled on the doors of the gate. --1.
                                                  Sam. xxi. 13.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Scrabble \Scrab"ble\, v. t.
   To mark with irregular lines or letters; to scribble; as, to
   scrabble paper.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Scrabble \Scrab"ble\, n.
   The act of scrabbling; a moving upon the hands and knees; a
   scramble; also, a scribble.
   [1913 Webster]

WordNet (r) 3.0 (2006):

scrabble
    n 1: an aimless drawing [syn: scribble, scrabble, doodle]
    2: a board game in which words are formed from letters in
       patterns similar to a crossword puzzle; each letter has a
       value and those values are used to score the game
    v 1: feel searchingly; "She groped for his keys in the dark"
         [syn: grope for, scrabble]
    2: write down quickly without much attention to detail [syn:
       scribble, scrabble]

Moby Thesaurus II by Grady Ward, 1.0:

88 Moby Thesaurus words for "scrabble":
   all fours, barbouillage, beat about, bore, burrow, clamber, crawl,
   crawling, creep, creeping, delve, dig, dig out, dike, doodle,
   dredge, drill, drive, excavate, feel around, feel for, fumble,
   furrow, go on tiptoe, gouge, gouge out, grabble, groove, grope,
   grope for, grovel, grub, gumshoe, gumshoeing, hen scratches,
   hen tracks, inch, inch along, lower, mine, nightwalk, nightwalking,
   pad, padding, pattes de mouche, poke around, pothookery, pothooks,
   pothooks and hangers, prowl, prowling, pry around, pussyfoot,
   pussyfooting, quarry, sap, scoop, scoop out, scramble, scrape,
   scratch, scrawl, scribble, scribbling, shovel, sidle, sidling,
   sink, slink, slinking, snake, snaking, sneak, sneaking, spade,
   squiggle, steal, steal along, stealing, tippytoe, tiptoe,
   tiptoeing, trench, trough, tunnel, worm, worm along, worming