Harmless and Treacherous

Opposite meaning words

Harmless adjective - Not causing or being capable of causing injury or hurt.

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Treacherous is an antonym for harmless.

Nearby Words: harm, harmful, harmlessly

Treacherous adjective - Not true in one's allegiance to someone or something.

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Harmless is an antonym for treacherous in topics: dangerous, dishonest.

Nearby Words: treachery, treacherously

Cite this Source

Treacherous and Harmless. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/harmless/treacherous

Harmless & Treacherous. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/harmless/treacherous>.

Treacherous or Harmless. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/harmless/treacherous.

Google Ngram Viewer shows how "harmless" and "treacherous" have occurred on timeline