Dubious
Dubious adjective - Giving good reason for being doubted, questioned, or challenged.
Usage example: any letter bearing the signature of Geronimo would be of dubious authenticity, to say the least
Improbable is a synonym for dubious in doubtful topic. In some cases you can use "Improbable" instead an adjective "Dubious", when it comes to topics like unlikely. popular alternative
Improbable
Improbable adjective - Not likely to be true or to occur.
Usage example: it seems improbable that the two writers never met since they traveled in the same social circles
Dubious is a synonym for improbable in unlikely topic. You can use "Dubious" instead an adjective "Improbable", if it concerns topics such as doubtful, not likely. popular alternative
Nearby Words: improbability, improbably
Mutual synonyms
Related pairs
- suspect and dubious
- suspect and improbable
- questionable and dubious
- questionable and improbable
- doubtful and dubious
- doubtful and improbable
- weak and dubious
- weak and improbable
- implausible and dubious
- implausible and improbable
- shady and dubious
- shady and improbable
- flimsy and dubious
- flimsy and improbable
Both words in one sentence
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Improbable Weapon User: CZW as a whole holds the dubious distinction of getting electronic weed whackers banned from sports in the country.
Source: Wrestling / CZW
Cite this Source
Improbable and Dubious. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/dubious/improbable
Dubious & Improbable. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/dubious/improbable>.
Improbable or Dubious. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/dubious/improbable.
Google Ngram Viewer shows how "dubious" and "improbable" have occurred on timeline