Foundationless and Sound

Opposite meaning words

Foundationless adjective - Having no basis in reason or fact.

Usage example: a careful investigation proved that the charges were foundationless

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Sound is an antonym for foundationless.

Sound adjective - According to the rules of logic.

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Foundationless is an antonym for sound.

Nearby Words: sounded, soundness, soundly, sounding, sounder

Cite this Source

Sound and Foundationless. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/foundationless/sound

Foundationless & Sound. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/foundationless/sound>.

Sound or Foundationless. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/foundationless/sound.

Google Ngram Viewer shows how "foundationless" and "sound" have occurred on timeline