The Collaborative International Dictionary of English v.0.48:

Stomach \Stom"ach\, v. t. [imp. & p. p. Stomached; p. pr. &
   vb. n. Stomaching.] [Cf. L. stomachari, v.t. & i., to be
   angry or vexed at a thing.]
   1. To resent; to remember with anger; to dislike. --Shak.
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            The lion began to show his teeth, and to stomach the
            affront.                              --L'Estrange.
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            The Parliament sit in that body . . . to be his
            counselors and dictators, though he stomach it.
                                                  --Milton.
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   2. To bear without repugnance; to brook. [Colloq.]
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The Collaborative International Dictionary of English v.0.48:

Stomach \Stom"ach\, n. [OE. stomak, F. estomac, L. stomachus,
   fr. Gr. sto`machos stomach, throat, gullet, fr. sto`ma a
   mouth, any outlet or entrance.]
   1. (Anat.) An enlargement, or series of enlargements, in the
      anterior part of the alimentary canal, in which food is
      digested; any cavity in which digestion takes place in an
      animal; a digestive cavity. See Digestion, and Gastric
      juice, under Gastric.
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   2. The desire for food caused by hunger; appetite; as, a good
      stomach for roast beef. --Shak.
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   3. Hence appetite in general; inclination; desire.
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            He which hath no stomach to this fight,
            Let him depart.                       --Shak.
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   4. Violence of temper; anger; sullenness; resentment; willful
      obstinacy; stubbornness. [Obs.]
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            Stern was his look, and full of stomach vain.
                                                  --Spenser.
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            This sort of crying proceeding from pride,
            obstinacy, and stomach, the will, where the fault
            lies, must be bent.                   --Locke.
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   5. Pride; haughtiness; arrogance. [Obs.]
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            He was a man
            Of an unbounded stomach.              --Shak.
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   Stomach pump (Med.), a small pump or syringe with a
      flexible tube, for drawing liquids from the stomach, or
      for injecting them into it.

   Stomach tube (Med.), a long flexible tube for introduction
      into the stomach.

   Stomach worm (Zool.), the common roundworm (Ascaris
      lumbricoides) found in the human intestine, and rarely in
      the stomach.
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The Collaborative International Dictionary of English v.0.48:

Stomach \Stom"ach\, v. i.
   To be angry. [Obs.] --Hooker.
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WordNet (r) 3.0 (2006):

stomach
    n 1: an enlarged and muscular saclike organ of the alimentary
         canal; the principal organ of digestion [syn: stomach,
         tummy, tum, breadbasket]
    2: the region of the body of a vertebrate between the thorax and
       the pelvis [syn: abdomen, venter, stomach, belly]
    3: an inclination or liking for things involving conflict or
       difficulty or unpleasantness; "he had no stomach for a fight"
    4: an appetite for food; "exercise gave him a good stomach for
       dinner"
    v 1: bear to eat; "He cannot stomach raw fish"
    2: put up with something or somebody unpleasant; "I cannot bear
       his constant criticism"; "The new secretary had to endure a
       lot of unprofessional remarks"; "he learned to tolerate the
       heat"; "She stuck out two years in a miserable marriage"
       [syn: digest, endure, stick out, stomach, bear,
       stand, tolerate, support, brook, abide, suffer,
       put up]

Moby Thesaurus II by Grady Ward, 1.0:

163 Moby Thesaurus words for "stomach":
   abatis, abdomen, abide, abomasum, accept, aftertaste, anus,
   appendix, appetite, bay window, bear, bear with, beard, beerbelly,
   belly, bitter, blind gut, blink at, bowels, brain, brains,
   breadbasket, brook, canine appetite, cecum, chitterlings,
   cockscomb, colon, condone, connive at, corporation, countenance,
   craving, craw, crop, desire, diaphragm, digest, disregard, down,
   drought, dryness, duodenum, eat, embonpoint, emptiness,
   empty stomach, endocardium, endure, entrails, first stomach,
   flavor, foregut, giblets, gizzard, go, gullet, gust, gut, guts,
   hankering, haslet, have, hear of, heart, hindgut, hollow hunger,
   honeycomb stomach, hunger, hungriness, ignore, inclination,
   indulge, innards, inner mechanism, insides, internals, intestine,
   inwards, jejunum, kidney, kidneys, kishkes, large intestine, liver,
   liver and lights, longing, lung, manyplies, marrow, maw, midgut,
   midriff, need, omasum, overlook, palate, paunch, perineum, pocket,
   pocket the affront, polydipsia, pot, potbelly, potgut, psalterium,
   pump, pusgut, put up with, pylorus, rectum, relish, rennet bag,
   reticulum, rumen, salt, sapidity, sapor, savor, savoriness,
   second stomach, smack, small intestine, sour, spare tire, spleen,
   stand, stand for, stick, suffer, swagbelly, swallow,
   swallow an insult, sweet, sweet tooth, sweetbread, take, tang,
   tapeworm, taste, third stomach, thirst, thirstiness, ticker,
   tolerance, tolerate, tongue, tooth, torment of Tantalus, tripe,
   tripes, tum-tum, tummy, turn aside provocation, underbelly, venter,
   ventripotence, vermiform appendix, viscera, vitals, wink at, works,
   yearning