Implausible
Implausible adjective - Too extraordinary or improbable to believe.
Vague and implausible are semantically related. In some cases you can use "Vague" instead an adjective "Implausible".
Nearby Word: implausibly
Vague
Vague adjective - Not expressed in precise terms.
Implausible and vague are semantically related. Sometimes you can use "Implausible" instead an adjective "Vague".
Both words in one sentence
- Either it couldn't possibly take up much time, is hopelessly vague or surreally implausible, or is something no-one in their right mind would prioritize over a promising date - which may of course be a deliberate hint.
Source: I Have to Wash My Hair -
Like many things fictional involving Mars, this is a case of Science Marches On: back when these stories were written, knowledge of human origins and evolution was still vague and fragmentary enough that the exogenesis theory wasn't completely implausible.
Source: Useful Notes / Mars - Clue for the Clueless gives two versions of this excuse: The first is vague but plausible, such as "I have 'plans' this evening", the second is specific and implausible, for example "I have to wax my cat", and is generally reserved for losers.
Source: I Have to Wash My Hair
Cite this Source
Vague and Implausible. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/implausible/vague
Implausible & Vague. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/implausible/vague>.
Vague or Implausible. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/implausible/vague.
Google Ngram Viewer shows how "implausible" and "vague" have occurred on timeline