Invalidity and Soundness
Opposite meaning words
Invalidity
Invalidity noun - Illogicality as a consequence of having a conclusion that does not follow from the premisses.
Soundness
Soundness noun - The ability to withstand force or stress without being distorted, dislodged, or damaged.
Invalidity is an antonym for soundness.
Cite this Source
Soundness and Invalidity. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/invalidity/soundness
Invalidity & Soundness. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/invalidity/soundness>.
Soundness or Invalidity. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/invalidity/soundness.
Google Ngram Viewer shows how "invalidity" and "soundness" have occurred on timeline