Synonyms of the word

illness

• n. (countable) An instance of a disease or poor health.
• n. (uncountable) A state of bad health or disease.

malady

• n. Any ailment or disease of the body; especially, a lingering or deep-seated disorder.
• n. A moral or mental defect or disorder.

sickness

• n. The quality or state of being sick or diseased; illness.
• n. Nausea; qualmishness; as, sickness of stomach.
• n. (linguistics) The analogical misuse of a rarer or marked grammatical case in the place of a more common…

unhealthiness

• n. The state of being unhealthy.

unwellness

• n. The state or characteristic of being unwell; a feeling of slight to moderate sickliness.