Sick or Ill
He’s been sick for over a year.
He’s been ill for over a year.
We can also use sick before certain nouns The sick room, a sick note, sick leave We use the plural noun the sick to mean ill people Angela worked with (he sick on the streets of Birmingham. To be ill means to be in bad health. To be sick means to vomit We sometimes use sick idiomatically to mean feeling ill: The smell made me sick.