Hollow
Hollow adjective - Curved inward.
Inefficacious and hollow are semantically related. In some cases you can use "Inefficacious" instead an adjective "Hollow".
Inefficacious
Inefficacious adjective - Producing no results.
Usage example: an inefficacious medication for a rare form of tuberculosis
Hollow and inefficacious are semantically related. Sometimes you can use "Hollow" instead an adjective "Inefficacious".
Mutual synonyms
Related pairs
Cite this Source
Inefficacious and Hollow. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/hollow/inefficacious
Hollow & Inefficacious. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/hollow/inefficacious>.
Inefficacious or Hollow. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/hollow/inefficacious.
Google Ngram Viewer shows how "hollow" and "inefficacious" have occurred on timeline