The main difference is that sick also has the specific underlying meaning of nauseated (for example: she drank too much and was sick all over everything), while ill is unspecified; and that when used as synonyms, ill is considered more formal or polite.
a person who is receiving medical care is "patient" the "sick" is people who are ill
In American usage the two are synonymous except that ill often suggests suffering from a disease or ailment, while sick often suggests feeling disgust and/or nausea, as in "That makes me sick."
The homophone for "ill" is "eel."
He's not sick. He's ill.
Bamb-Ill is a play on the character named Bambi. Ill is another word for sick.
Sick or ill, the words are to an extent interchangeable; one can say he is sick or he is ill. Although I personally would be more concerned about ill than about sick. Ill suggests something serious like a stroke whereas sick suggest a sore throat.And feeling sick means feeling nauseous whilst feeling ill means feeling unwell.So overall , ill is more serious, sick is more trivial.But non-humans tend only to be sick eg a sick cow, a sick joke, a sick economy.The above answer is true for American English; in Britain, you'd say "ill" when you have any kind of bodily distress, but "sick" usually means stomach sickness and vomiting.
Ill
That your very sick or seriously ill.
The synonym of ill is also "sick", meaning; not in full health.
Frail-weak Sick-ill
you know when u are ill because you feel sick
Tree is tree and horse is horse.And horse is sick and tree is not.