Synonyms and related words :
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