The Collaborative International Dictionary of English v.0.48:

Split \Split\ (spl[i^]t), v. t. [imp. & p. p. Split
   (Splitted, R.); p. pr. & vb. n. Splitting.] [Probably of
   Scand. or Low German origin; cf. Dan. splitte, LG. splitten,
   OD. splitten, spletten, D. splijten, G. spleissen, MHG.
   spl[imac]zen. Cf. Splice, Splint, Splinter.]
   1. To divide lengthwise; to separate from end to end, esp. by
      force; to divide in the direction of the grain or layers;
      to rive; to cleave; as, to split a piece of timber or a
      board; to split a gem; to split a sheepskin.
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            Cold winter split the rocks in twain. --Dryden.
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   2. To burst; to rupture; to rend; to tear asunder.
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            A huge vessel of exceeding hard marble split asunder
            by congealed water.                   --Boyle.
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   3. To divide or break up into parts or divisions, as by
      discord; to separate into parts or parties, as a political
      party; to disunite. [Colloq.] --South.
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   4. (Chem.) To divide or separate into components; -- often
      used with up; as, to split up sugar into alcohol and
      carbonic acid.
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   To split hairs, to make distinctions of useless nicety.
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WordNet (r) 3.0 (2006):

splitting
    adj 1: resembling a sound of violent tearing as of something
           ripped apart or lightning splitting a tree; "the tree
           split with a great ripping sound"; "heard a rending roar
           as the crowd surged forward" [syn: rending, ripping,
           splitting]

Moby Thesaurus II by Grady Ward, 1.0:

70 Moby Thesaurus words for "splitting":
   abscission, acute, amputation, apportionment, budgeting,
   butchering, catalysis, catalyst, chopping, cleavage, cutting,
   cutting the pie, decay, dialysis, dichotomy, dissociation,
   dividing, division, divvy, drastic, enucleation, excessive,
   excision, exorbitant, extravagant, extreme, fierce, fission,
   furious, great, hydrolysis, hydrolyst, immoderate, intemperate,
   intense, keen, laceration, mutilation, outrageous, parceling,
   partition, partitioning, photolysis, piercing, portioning,
   rationing, rending, repartition, resection, rigorous, ripping,
   rough, scission, section, severance, severe, sharing, sharing out,
   sharp, slashing, slicing, surgery, tearing, thermolysis, tough,
   unconscionable, vehement, venomous, violent, virulent