[1] : WordNet (r) 2.0

stomachache
     n : an ache localized in the stomach or abdominal region syn: stomach
         ache, bellyache, gastralgia
see also:
stomach ache bellyache gastralgia 

[2] : Moby Thesaurus II by Grady Ward, 1.0

28 moby thesaurus words for "stomachache":
   ache, aching, angina, backache, bellyache, cephalalgia, colic,
   collywobbles, distress, earache, fret, gnawing, gripe, gripes,
   gut-ache, headache, heartburn, hemicrania, megrim, migraine,
   misery, odontalgia, otalgia, pyrosis, sick headache,
   splitting headache, throbbing pain, toothache

Stomachache >> S Words
Stomachache, definition of term: Stomachache
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