- ill [adj1] sick afflicted, ailing, a wreck*, below par*, bummed*, diseased, down, down with, feeling awful, feeling rotten, feeling terrible, got the bug*, indisposed, infirm, laid low*, off one’s feet*, on sick list*, out of sorts*, peaked, poorly, queasy, rotten, run-down, running temperature, sick as a dog*, under the weather*, unhealthy, unwell, woozy*; concept 314 —Ant. good, healthy, sound, strong, well ill [adj2] bad, evil acrimonious, adverse, antagonistic, cantankerous, cross, damaging, deleterious, detrimental, disrespectful, disturbing, foreboding, foul, harmful, harsh, hateful, hostile, hurtful, ill-mannered, impertinent, inauspicious, inimical, iniquitous, injurious, malevolent, malicious, nocent, nocuous, noxious, ominous, ruinous, sinister, sullen, surly, threatening, unfavorable, unfortunate, unfriendly, ungracious, unhealthy, unkind, unlucky, unpromising, unpropitious, unwholesome, vile, wicked, wrong; concepts 537,545,570 —Ant. good ill [n] misfortune abuse, affection, affliction, ailment, badness, complaint, condition, cruelty, damage, depravity, destruction, disease, disorder, evil, harm, hurt, illness, indisposition, infirmity, injury, insult, malady, malaise, malice, mischief, misery, pain, sickness, suffering, syndrome, trial, tribulation, trouble, unpleasantness, wickedness, woe, wrong; concepts 316,674,675 —Ant. benefit, blessing, fortune, happiness, luck, privilege, profit, prosperity
New thesaurus. 2014.