Bad
Bad adjective - Falling short of a standard.
Usage example: a bad first attempt at making meat loaf resulted in a soggy, inedible mess
Ill is a synonym for bad in sick topic. In some cases you can use "Ill" instead the word "Bad" as an adjective or a noun or an adverb, when it comes to topics like help, luck, health, sinful. popular alternative
Ill
Ill adjective - Causing or capable of causing harm.
Usage example: one of the ill effects of winter weather is the rapid spread of germs as people spend more time together indoors
Bad is a synonym for ill in behaviour topic. You can use "Bad" instead the word "Ill" as an adjective or a noun or an adverb, if it concerns topics such as help, luck, sinful, sick. popular alternative
Nearby Word: illness
Mutual synonyms
Both words in one sentence
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Generational Saga: The series goes from Heaven to her daughter Annie and finally to her mother Leigh, mostly dealing with the effects Tony, Jillian, Troy, and Luke had on their lives (ill or bad).
Source: Literature / The Casteel Series -
Several other episodes see rouge or otherwise bad or ill-suited police officers either get let go, voluntarily agree to turn in their badge or get washed out.
Source: Turn in Your Badge -
Earlier, Lin Beifong is directed to a therapist to help her deal with her issues with her sister, which are bad enough that they're making her physically ill.
Source: The Shrink
Cite this Source
Ill and Bad. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/bad/ill
Bad & Ill. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/bad/ill>.
Ill or Bad. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/bad/ill.
Google Ngram Viewer shows how "bad" and "ill" have occurred on timeline