The Oxford Thesaurus An A-Z Dictionary of Synonyms - sickadj.

1) Chiefly Brit nauseated, queasy, sick to one's stomach, squeamish, qualmish; seasick, carsick, airsick, Colloq green around the gills: Patrick felt a bit sick after the rough ferry crossing. 2) ill, unwell, unhealthy, sickly, indisposed, infirm, ailing, diseased, afflicted, Colloq under the weather, on the sick-list, poorly, laid up, not (feeling) up to snuff: If you feel sick, you'd best see a doctor. I've been sick for a week. 3) affected, troubled, stricken, heartsick, wretched, miserable, burdened, weighed down: I was sick with worry to learn of the problems you have been having with your business. 4) mad, crazy, insane, deranged, disturbed, neurotic, unbalanced, psychoneurotic, psychotic, Colloq mental, US off ((one's) rocker or trolley) : Anyone who could have committed such a crime must be sick. 5) peculiar, unconventional, strange, weird, odd, bizarre, grotesque, macabre, shocking, ghoulish, morbid, gruesome, stomach-turning, sadistic, masochistic, sado-masochistic, Colloq kinky, bent, far-out, US off: In 30 years as a policeman, I've seen some sick things, but this is the end. 6) sickened, shocked, put out, upset, appalled, disgusted, revolted, repulsed, offended, repelled, nauseated; annoyed, chagrined, irritated: She was sick at what she saw in the army field hospital. The way you do things sometimes makes me sick. 7) Sometimes, sick of. (sick and) tired, bored, weary, Colloq fed up with: Don't you get sick of telling them the same thing so many times?