Nonvalid and Well-grounded
Opposite meaning words
Nonvalid
Nonvalid adjective - Having no basis in reason or fact.
Usage example: a nonvalid theory that most scientists rejected long ago
Well-grounded is an antonym for nonvalid.
Well-grounded
Well-grounded adjective - According to the rules of logic.
Nonvalid is an antonym for well-grounded.
Cite this Source
Well-grounded and Nonvalid. (2017). Retrieved 2026, August 13, from https://thesaurus.plus/related/nonvalid/well-grounded
Nonvalid & Well-grounded. N.p., 2017. Web. 13 Aug. 2026. <https://thesaurus.plus/related/nonvalid/well-grounded>.
Well-grounded or Nonvalid. 2017. Accessed August 13, 2026. https://thesaurus.plus/related/nonvalid/well-grounded.
