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
Insidious and dangerous are semantically related In some cases you can use "Insidious" instead an adjective "Dangerous".
Nearby Words: danger, dangerously
Insidious
Insidious adjective - Intended to entrap.
Dangerous and insidious are semantically related in sneaky topic. Sometimes you can use "Dangerous" instead an adjective "Insidious".
Nearby Word: insidiously
Mutual synonyms
Related pairs
Both words in one sentence
- Obvious evil is easy to spot and thus not as dangerous; insidious or hidden evil is much worse.
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Okay folks, listen up: many of the dangerous behaviors in life are as insidious and widespread as they are because most of the time, nothing bad comes of doing them.
Source: Can't Get Away with Nuthin'
Cite this Source
Insidious and Dangerous. (2016). Retrieved 2026, July 29, from https://thesaurus.plus/related/dangerous/insidious
Dangerous & Insidious. N.p., 2016. Web. 29 Jul. 2026. <https://thesaurus.plus/related/dangerous/insidious>.
Insidious or Dangerous. 2016. Accessed July 29, 2026. https://thesaurus.plus/related/dangerous/insidious.
Google Ngram Viewer shows how "dangerous" and "insidious" have occurred on timeline