Invalid
Invalid adjective - Chronically or repeatedly suffering from poor health.
Usage example: an old and now invalid woman who rarely gets out anymore
Sick is a synonym for invalid in feeling topic. In some cases you can use "Sick" instead an adjective "Invalid", when it comes to topics like sickly, bedridden, disabled.
Sick
Sick adjective - Temporarily suffering from a disorder of the body.
Usage example: those coworkers who always seem to get sick immediately before or after long holiday weekends
Invalid is a synonym for sick in not healthy topic. You can use "Invalid" instead an adjective "Sick".
Mutual synonyms
Both words in one sentence
- So this trope comes into play when a character makes up a sick or invalid relative in order to escape their daily life/obligations, excusing their absence to others as a visit to said relative.
Source: Invented Invalid -
Handymen are cyborg monstrosities created from people who were sick, disabled or invalid — sometimes against their will, sometimes in hopes of being cured.
Source: Tragic Monster - An episode has the Phineas, while sick in bed, playing a fighting game with his other invalid friends.
Source: Double Knockout
Cite this Source
Sick and Invalid. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/invalid/sick
Invalid & Sick. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/invalid/sick>.
Sick or Invalid. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/invalid/sick.
Google Ngram Viewer shows how "invalid" and "sick" have occurred on timeline