Bad
Bad adjective - Falling short of a standard.
Usage example: a bad first attempt at making meat loaf resulted in a soggy, inedible mess
Deficient is a synonym for bad in inferior topic. In some cases you can use "Deficient" instead an adjective "Bad", when it comes to topics like defective, faulty, unsatisfactory, substandard.
Deficient
Mutual synonyms
Both words in one sentence
- The only fully unsympathetic bad guys in Part 1 are the Prophets R'Noh Custo and Excellent Redolence, who are motivated by racism for the borderline-genetically deficient.
Source: Literature / Halo: Broken Circle
Cite this Source
Deficient and Bad. (2016). Retrieved 2026, August 10, from https://thesaurus.plus/related/bad/deficient
Bad & Deficient. N.p., 2016. Web. 10 Aug. 2026. <https://thesaurus.plus/related/bad/deficient>.
Deficient or Bad. 2016. Accessed August 10, 2026. https://thesaurus.plus/related/bad/deficient.
Google Ngram Viewer shows how "bad" and "deficient" have occurred on timeline