Invalid
Invalid adjective - Chronically or repeatedly suffering from poor health.
Inefficacious and invalid are semantically related. In some cases you can use "Inefficacious" instead an adjective "Invalid".
Inefficacious
Inefficacious adjective - Not producing the desired result.
Invalid and inefficacious are semantically related. Sometimes you can use "Invalid" instead an adjective "Inefficacious".
Mutual synonyms
Related pairs
- inadequate and invalid
- inadequate and inefficacious
- feeble and invalid
- feeble and inefficacious
- weak and invalid
- weak and inefficacious
- worthless and invalid
- worthless and inefficacious
- inoperative and invalid
- inoperative and inefficacious
- ineffective and invalid
- ineffective and inefficacious
- vain and invalid
- vain and inefficacious
Cite this Source
Inefficacious and Invalid. (2016). Retrieved 2026, August 12, from https://thesaurus.plus/related/invalid/inefficacious
Invalid & Inefficacious. N.p., 2016. Web. 12 Aug. 2026. <https://thesaurus.plus/related/invalid/inefficacious>.
Inefficacious or Invalid. 2016. Accessed August 12, 2026. https://thesaurus.plus/related/invalid/inefficacious.
Google Ngram Viewer shows how "invalid" and "inefficacious" have occurred on timeline