False
False adjective - Not being in agreement with what is true.
Unauthorized and false are semantically related. In some cases you can use "Unauthorized" instead an adjective "False".
Unauthorized
Unauthorized adjective - Not endowed with authority.
False and unauthorized are semantically related. Sometimes you can use "False" instead an adjective "Unauthorized".
Nearby Word: unauthorised
Mutual synonyms
Both words in one sentence
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Early in the film, Group Captain Mandrake goes to tell General Ripper the alert they're under is a false alarm and that he should recall the bombers, concluding Ripper sent out unauthorized attack orders even as he's talking.
Source: Oh Crap / Film -
They never run, approaching their targets at a calm walk while spouting False Reassurance, and strangle, chop, or bash any unauthorized human when they get within arm's reach.
Source: Video Game / Alien: Isolation
Cite this Source
Unauthorized and False. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/false/unauthorized
False & Unauthorized. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/false/unauthorized>.
Unauthorized or False. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/false/unauthorized.
Google Ngram Viewer shows how "false" and "unauthorized" have occurred on timeline