Harmless
Harmless adjective - Not causing or being capable of causing injury or hurt.
Usage example: a perfectly harmless little spider
Innocuous is a synonym for harmless in safe topic. In some cases you can use "Innocuous" instead an adjective "Harmless", when it comes to topics like inoffensive, help, property, innocent. popular alternative
Innocuous
Innocuous adjective - Not causing or being capable of causing injury or hurt.
Usage example: those innocuous lies we must tell every day if society is to remain civil
Harmless is a synonym for innocuous in help topic. You can use "Harmless" instead an adjective "Innocuous", if it concerns topics such as property, innocent, inoffensive. popular alternative
Mutual synonyms
Both words in one sentence
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There's also the concept of innocuous doubles (originating in Problem Sleuth); weapons that exist as other, more harmless objects until they're ready to be wielded.
Source: Impossibly Cool Weapon -
Empowered: You'd think that in a series featuring characters with names like Demonwolf or Deathmonger, someone who goes by the seeming innocuous name of Willy Pete would be relatively harmless.
Source: Fluffy the Terrible -
Not-So-Harmless Villain - The denizens of Hellrealm seem fairly innocuous at first, giving you tips like most NPCs and discussing cloaks.
Source: Video Game / Folklore
Cite this Source
Innocuous and Harmless. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/harmless/innocuous
Harmless & Innocuous. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/harmless/innocuous>.
Innocuous or Harmless. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/harmless/innocuous.
Google Ngram Viewer shows how "harmless" and "innocuous" have occurred on timeline