Corroborated
Firm and corroborated are semantically related. In some cases you can use "Firm" instead an adjective "Corroborated".
Firm
Firm adjective - Based on sound reasoning or information.
Usage example: that assassination theory is far from firm, since there's not a shred of actual evidence to back it up
Corroborated and firm are semantically related. Sometimes you can use "Corroborated" instead an adjective "Firm".
Mutual synonyms
Cite this Source
Firm and Corroborated. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/corroborated/firm
Corroborated & Firm. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/corroborated/firm>.
Firm or Corroborated. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/corroborated/firm.
Google Ngram Viewer shows how "corroborated" and "firm" have occurred on timeline