The DICT Development Group

  167 Moby Thesaurus words for "ill":
     abomination, affection, ailing, ailment, amiss, apocalyptic,
     atrocity, bad, badly, baleful, bane, baneful, befoulment,
     below par, black, blight, bodeful, boding, complaint, condition,
     corruption, criminal, critically ill, crying evil, damage,
     damaging, dark, defilement, deleterious, despoliation, destruction,
     detriment, detrimental, dire, disadvantageously, disagreeable,
     disagreeably, discourteous, disease, disorder, disrespectful,
     doomful, down, dreary, evil, evil-starred, evilly, faint, faintish,
     fateful, feeling awful, feeling faint, feeling something terrible,
     foreboding, gloomy, grievance, harm, havoc, hurt, hurtful,
     ill-boding, ill-bred, ill-fated, ill-mannered, ill-omened,
     ill-starred, impertinent, impolite, improper, in danger,
     inaccurate, inauspicious, incline, inconveniently, indisposed,
     inexpedient, infection, inferior, infirmity, inhospitable,
     inhospitably, inimical, injurious, injury, invalid, laid low,
     lowering, malady, malevolent, menacing, mischief, mortally ill,
     not quite right, of evil portent, off-color, ominous, out of sorts,
     outrage, peccant, poison, pollution, portending, portentous, rocky,
     rude, seedy, sick, sick unto death, sickish, sickness, sinful,
     sinister, somber, syndrome, taken ill, the worst, threatening,
     toxin, unadvantageously, unaffectionate, unaffectionately,
     unamiable, unamiably, unbenign, unbenignant, unbenignantly,
     unbenignly, uncompassionate, uncompassionately, uncompassioned,
     uncordial, uncordially, under the weather, unfavorable,
     unfortunate, unfriendly, ungenial, ungenially, ungracious,
     ungraciously, unhandily, unhealthy, unkind, unkindly, unloving,
     unlovingly, unlucky, unpleasant, unprofitably, unpromising,
     unpropitious, unrewardingly, unskillful, unsympathetic,
     unsympathetically, unsympathizing, untoward, unwell, uselessly,
     venom, vexation, vicious, wicked, with difficulty, woe, wrong,
     wrongly