Harmless
Harmless adjective - Not causing or being capable of causing injury or hurt.
Usage example: a perfectly harmless little spider
Threatening is an antonym for harmless.
Threatening
Threatening adjective - Involving potential loss or injury.
Usage example: threatening rocks lined that narrow stretch of the river through which we would be rafting
Harmless is an antonym for threatening.
Both words in one sentence
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He will usually be involved in plots that require guys, as well as be a non-threatening and harmless crush object for the assorted cast as needed.
Source: The One Guy -
Innocent Bystander: A little girl is crying off slightly to the left when Doomsday rampages, this is enough to earn his murderous ire since he can't distinguish between friend or foe, something threatening or harmless.
- Hector the Bulldog, when not punishing Sylvester for trying to eat a sweet innocent little bird, is physically threatening him for failing to catch a (supposedly) similar harmless little mouse.
Cite this Source
Threatening and Harmless. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/harmless/threatening
Harmless & Threatening. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/harmless/threatening>.
Threatening or Harmless. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/harmless/threatening.
Google Ngram Viewer shows how "harmless" and "threatening" have occurred on timeline