Bad
Bad adjective - Causing or capable of causing harm.
Usage example: sitting too close to the television is said to be bad for the eyes
Harmful is a synonym for bad in help topic. In some cases you can use "Harmful" instead an adjective "Bad", when it comes to topics like attribution, detrimental. popular alternative
Harmful
Harmful adjective - Causing or capable of causing harm.
Usage example: DDT has been proven to be extremely harmful to the environment
Bad is a synonym for harmful in help topic. You can use "Bad" instead an adjective "Harmful", if it concerns topics such as attribution, injurious, detrimental. popular alternative
Mutual synonyms
Both words in one sentence
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If the power is used by one of the good guys, the power is shown to be bad or harmful in some way, be it to themselves, others, or the universe in general.
Source: Lovecraftian Superpower - Solid Snake smokes in many of the Metal Gear games, and it's frequently observed (by other characters as well as by in-game text) that this is bad and harmful to him.
Source: Anvilicious / Video Games -
Felix defines it as an elemental, ambient force manipulated via metaphors; there can be good metaphors, or harmful metaphors, but bad metaphors simply won't work.
Source: Functional Magic aka: Magic
Cite this Source
Harmful and Bad. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/bad/harmful
Bad & Harmful. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/bad/harmful>.
Harmful or Bad. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/bad/harmful.
Google Ngram Viewer shows how "bad" and "harmful" have occurred on timeline