Confirmed
Confirmed adjective - Firmly established over time.
Usage example: a confirmed tendency to exaggerate about everything
Firm is a synonym for confirmed in characteristic topic. In some cases you can use "Firm" instead an adjective "Confirmed", when it comes to topics like established.
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
Confirmed is a synonym for firm in definite topic. Sometimes you can use "Confirmed" instead an adjective "Firm", if it concerns topics such as characteristic, established.
Mutual synonyms
Both words in one sentence
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It was a little too firm to be believed anyway, but lost all credibility when Doug and Lindsay confirmed later that the characters already had sex at this point.
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He also has a firm belief in the power of his terrible chat-up lines, even though he has had one confirmed romantic encounter, with a woman who was possibly concussed and calling him Norman.
Source: Extraverted Nerd
Cite this Source
Firm and Confirmed. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/confirmed/firm
Confirmed & Firm. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/confirmed/firm>.
Firm or Confirmed. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/confirmed/firm.
Google Ngram Viewer shows how "confirmed" and "firm" have occurred on timeline