Be lacking
Fail and be lacking are semantically related In some cases you can use "Fail" instead a verb phrase "Be lacking".
Fail
Fail verb - To stop functioning.
Be lacking and fail are semantically related in be deficient topic. You can use "Be lacking" instead a verb "Fail".
Mutual synonyms
Cite this Source
Fail and Be lacking. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/be_lacking/fail
Be lacking & Fail. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/be_lacking/fail>.
Fail or Be lacking. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/be_lacking/fail.
Google Ngram Viewer shows how "be lacking" and "fail" have occurred on timeline