WordNet (r) 3.0 (2006):

intensive care
    n 1: close monitoring and constant medical care of patients with
         life-threatening conditions

Moby Thesaurus II by Grady Ward, 1.0:

26 Moby Thesaurus words for "intensive care":
   X ray, blood bank, charity ward, clinic, consultation room,
   delivery room, dispensary, emergency, examining room, fever ward,
   hospital room, isolation, labor room, laboratory, maternity ward,
   nursery, operating room, pharmacy, prison ward, private room,
   recovery room, semi-private room, surgery, therapy, treatment room,
   ward