Inefficacy
Inefficacy noun - A lack of efficacy.
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Synonyms for Inefficacy
Obstacle and inefficacy are semantically related. In some cases you can use "Obstacle" instead a noun "Inefficacy".
Obstacle
Obstacle noun - Something that makes movement or progress difficult.
Inefficacy and obstacle are semantically related. Sometimes you can use "Inefficacy" instead a noun "Obstacle".
Mutual synonyms
Cite this Source
Obstacle and Inefficacy. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/inefficacy/obstacle
Inefficacy & Obstacle. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/inefficacy/obstacle>.
Obstacle or Inefficacy. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/inefficacy/obstacle.
Google Ngram Viewer shows how "inefficacy" and "obstacle" have occurred on timeline