Dangerous
Dangerous adjective - Causing or capable of causing harm.
Usage example: the common knowledge that smoking is dangerous to one's health hasn't stopped some people
Sinister and dangerous are semantically related. In some cases you can use "Sinister" instead an adjective "Dangerous".
Nearby Words: danger, dangerously
Sinister
Sinister adjective - Being or showing a sign of evil or calamity to come.
Mutual synonyms
Both words in one sentence
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That's cute, since girls are innocent and childlike, never sinister or dangerous.
Source: Double Standard -
There are a few differences, and he's arguably a lot more sinister and dangerous.
Source: Film / Moonraker -
Also, the government investigators seem sinister and dangerous but they're trying to make First Contact without making things more complicated.
Cite this Source
Sinister and Dangerous. (2016). Retrieved 2026, August 07, from https://thesaurus.plus/related/dangerous/sinister
Dangerous & Sinister. N.p., 2016. Web. 07 Aug. 2026. <https://thesaurus.plus/related/dangerous/sinister>.
Sinister or Dangerous. 2016. Accessed August 07, 2026. https://thesaurus.plus/related/dangerous/sinister.
Google Ngram Viewer shows how "dangerous" and "sinister" have occurred on timeline