Illness vs. Sickness

Illnessnoun

(countable) An instance of a disease or poor health.

Illnessnoun

(uncountable) A state of bad health or disease.

Illnessnoun

The condition of being ill, evil, or bad; badness; unfavorableness.

Illnessnoun

Disease; indisposition; malady; disorder of health; sickness; as, a short or a severe illness.

Illnessnoun

Wrong moral conduct; wickedness.

Illnessnoun

impairment of normal physiological function affecting part or all of an organism

Illnessnoun

a disease or period of sickness affecting the body or mind

Sicknessnoun

The quality or state of being sick or diseased; illness.

Sicknessnoun

Nausea; qualmishness; as, sickness of stomach.

Sicknessnoun

(linguistics) The analogical misuse of a rarer or marked grammatical case in the place of a more common or unmarked case.

Sicknessnoun

The quality or state of being sick or diseased; illness; sisease or malady.

Sicknessnoun

Nausea; qualmishness; as, sickness of stomach.

Sicknessnoun

impairment of normal physiological function affecting part or all of an organism

Sicknessnoun

the state that precedes vomiting