Implausible
Implausible adjective - Too extraordinary or improbable to believe.
Usage example: the terrorist attacks generated a whole passel of implausible conspiracy theories that dishonor the memory of those who perished
Questionable is a synonym for implausible in unlikely topic. In some cases you can use "Questionable" instead an adjective "Implausible".
Nearby Word: implausibly
Questionable
Questionable adjective - Not likely to be true or to occur.
Usage example: it's questionable that he will show up tonight considering all the bad weather we're having
Implausible is a synonym for questionable in unverified topic. Sometimes you can use "Implausible" instead an adjective "Questionable".
Mutual synonyms
Related pairs
- suspect and implausible
- suspect and questionable
- dubious and implausible
- dubious and questionable
- doubtful and implausible
- doubtful and questionable
- weak and implausible
- weak and questionable
- flimsy and implausible
- flimsy and questionable
- suspicious and implausible
- suspicious and questionable
- incredible and implausible
- incredible and questionable
Both words in one sentence
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They're scientists, they're somewhat scatterbrained, their practice is questionable, and they are frequently working for the bad guys, building implausible gadgetry in their Mad Scientist Laboratory, or slightly ridiculous superweapons.
Source: Mad Scientist -
A more gender-appropriate inversion appears in Questionable Content, when Faye is convinced Marten and Dora have had sex because he's wearing her pants ... except that their implausible excuse turns out to be literally true.
Source: Sexy Shirt Switch
Cite this Source
Questionable and Implausible. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/implausible/questionable
Implausible & Questionable. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/implausible/questionable>.
Questionable or Implausible. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/implausible/questionable.
Google Ngram Viewer shows how "implausible" and "questionable" have occurred on timeline