Frail
Invalid
Invalid adjective - Chronically or repeatedly suffering from poor health.
Usage example: an old and now invalid woman who rarely gets out anymore
Frail and invalid are semantically related in sickly topic. Sometimes you can use "Frail" instead an adjective "Invalid", if it concerns topics such as disabled.
Mutual synonyms
Both words in one sentence
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Afterwards Terry manages to scare teens away from the drug with a very effective Public Service Announcement: showing them that Bane had been reduced to an extremely frail invalid who needed Venom just to stay alive after decades of using the stuff.
Source: Fantastic Drug
Cite this Source
Invalid and Frail. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/frail/invalid
Frail & Invalid. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/frail/invalid>.
Invalid or Frail. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/frail/invalid.
Google Ngram Viewer shows how "frail" and "invalid" have occurred on timeline