Lethal
Lethal adjective - Likely to cause or capable of causing death.
Usage example: we were lucky that the snake's venom wasn't lethal, and our friend turned out to be all right
Perilous and lethal are semantically related. In some cases you can use "Perilous" instead an adjective "Lethal".
Nearby Word: lethality
Perilous
Perilous adjective - Involving potential loss or injury.
Usage example: a perilous journey through hostile territory
Lethal and perilous are semantically related. Sometimes you can use "Lethal" instead an adjective "Perilous".
Nearby Words: peril, perilously, periled
Mutual synonyms
Cite this Source
Perilous and Lethal. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/lethal/perilous
Lethal & Perilous. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/lethal/perilous>.
Perilous or Lethal. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/lethal/perilous.
Google Ngram Viewer shows how "lethal" and "perilous" have occurred on timeline