Insidiousness and Openness

Opposite meaning words

Insidiousness noun - Subtle and cumulative harmfulness (especially of a disease).

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Openness is an antonym for insidiousness in topics: lying, dishonesty, indirection.

Openness noun - The free expression of one's true feelings and opinions.

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Insidiousness is an antonym for openness.

Nearby Words: open, opening, openly

Cite this Source

Openness and Insidiousness. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/insidiousness/openness

Insidiousness & Openness. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/insidiousness/openness>.

Openness or Insidiousness. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/insidiousness/openness.

Google Ngram Viewer shows how "insidiousness" and "openness" have occurred on timeline