Ill and Invalid

Ill

Ill adjective - Temporarily suffering from a disorder of the body.
Usage example: since I'm ill, I guess that I'll just have to miss that dental appointment

Invalid is a synonym for ill. In some cases you can use "Invalid" instead an adjective "Ill".

Nearby Word: illness

Invalid

Invalid adjective - Chronically or repeatedly suffering from poor health.
Usage example: an old and now invalid woman who rarely gets out anymore

Ill is a synonym for invalid in sickly topic. Sometimes you can use "Ill" instead an adjective "Invalid", if it concerns topics such as disabled.

How words are described

elderly elderly ill elderly invalid
Cite this Source
Invalid and Ill. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/ill/invalid
Ill & Invalid. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/ill/invalid>.
Invalid or Ill. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/ill/invalid.
Google Ngram Viewer shows how "ill" and "invalid" have occurred on timeline