What is the difference between sick and ill?

ill and sick both mean "sick; sick", but their usage is not exactly the same

1. ill means "sick; sick" When it means, it is generally used as a predicate and cannot be used as an attributive; while sick can be used as both a predicate and an attributive

2. In addition, sick means "vomiting, nausea" and can only be used as a predicate. , but ill does not have this meaning

3. In addition, when ill is used as an attributive to modify a noun, it means "bad; evil", but sick does not have this meaning. 1. Therefore, the difference between ill and sick is: ill is usually used as a predicative, and generally does not need to be an attributive, but if it expresses harmful meaning, it can only be used as an attributive; while sick can be used as both a predicative and an attributive, but there is " Vomiting, nausea" means.