ill 29 synonyms and 7 antonyms for ill, ranked by how commonly they're used. Adjective — Unwell or in poor health; sick. Synonyms for ill bad mal- crank crook green about the gills icky indisposed infirm like death warmed over lousy maladive mawkish off one's feed on the Pat and Mick out of sorts Pat and Mick punk puny queer ropy rough sickish sickly sick as a dog sick as a parrot tumid unhealthy valetudinarian valetudinary Antonyms for ill fine hale healthy in good health well good wack ← Back to the full definition of ill
