Bad
Bad adjective - Engaging in or marked by childish misbehavior.
Usage example: the children were bad, so they didn't get dessert
Thoughtless and bad are semantically related. In some cases you can use "Thoughtless" instead an adjective "Bad".
Thoughtless
Thoughtless adjective - Showing a lack of manners or consideration for others.
Bad and thoughtless are semantically related. Sometimes you can use "Bad" instead an adjective "Thoughtless".
Mutual synonyms
Both words in one sentence
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He is a hyper boy, with flashes of genius, moments of thoughtless cruelty, and the ability to make a bad pun out of anything.
Source: Manga / Patalliro! -
Averted when Toua points out that the reason they've always been underdogs is not due to a glaringly obvious lack of skill — but strategically weak game plans, bad coaching, thoughtless management, low self-esteem and a great deal of misconceptions regarding what a baseball game is all about.
Source: Manga / One Outs - Bad Boss: Although he tries to cast himself as (and seems to genuinely believe himself to be) a Benevolent Boss, even if you've never seen the TV show it's quite clear that Alan is an inept, stingy, bullying and thoughtless boss to his assistant.
Cite this Source
Thoughtless and Bad. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/bad/thoughtless
Bad & Thoughtless. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/bad/thoughtless>.
Thoughtless or Bad. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/bad/thoughtless.
Google Ngram Viewer shows how "bad" and "thoughtless" have occurred on timeline