WordNet sense 1 (mildly physically distressed):

upset, upset

WordNet sense 2 (feeling nausea; feeling about to vomit):

nauseated, nauseous, queasy, sickish

WordNet sense 3 (looking pale and unhealthy):

green

WordNet sense 4 (experiencing odd bodily sensations):

funny

WordNet sense 5 (experiencing delirium):

delirious

WordNet sense 6 (experiencing motion sickness):

seasick

WordNet sense 7 (somewhat ill or prone to illness):

ailing, indisposed, poorly, sickly, unwell

WordNet sense 8 (affected by an impairment of normal physical or mental function):

ill

WordNet sense 9 ((of light) lacking in intensity or brightness; dim or feeble):

pale, pallid, wan

WordNet sense 10 (having little physical or spiritual strength):

weak

WordNet sense 11 (affected with madness or insanity):

crazy, demented, distracted, disturbed, mad, unbalanced, unhinged, brainsick

WordNet sense 12 (afflicted with or characteristic of mental derangement):

insane

WordNet sense 13 (having a strong distaste from surfeit):

disgusted

WordNet sense 14 (not pleased; experiencing or manifesting displeasure):

displeased

WordNet sense 15 (being excited or provoked to the expression of an emotion):

affected, touched, moved, stirred

WordNet sense 16 (shockingly repellent; inspiring horror):

ghastly, grim, grisly, gruesome, macabre

WordNet sense 17 (causing alarm or fear):

alarming

WordNet sense 18 (eject the contents of the stomach through the mouth):

barf, cast, cat, chuck, disgorge, honk, puke, purge, regurgitate, retch, spew, upchuck, vomit, regorge, spue, be sick, throw up, vomit up