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
Unlikely is a synonym for improbable in likely topic. In some cases you can use "Unlikely" instead an adjective "Improbable", when it comes to topics like doubtful, fantastic, not likely. popular alternative
Nearby Words: improbability, improbably
Unlikely
Unlikely adjective - Not likely to be true or to occur.
Usage example: in the unlikely event that the file is deleted or corrupted, you will want to have backup copies available
Improbable is a synonym for unlikely in likely topic. You can use "Improbable" instead an adjective "Unlikely", if it concerns topics such as implausible, fantastic, not probable. popular alternative
Nearby Word: unlikeliness
Mutual synonyms
Related pairs
- fanciful and improbable
- fanciful and unlikely
- dubious and improbable
- dubious and unlikely
- questionable and improbable
- questionable and unlikely
- doubtful and improbable
- doubtful and unlikely
- weak and improbable
- weak and unlikely
- slight and improbable
- slight and unlikely
- implausible and improbable
- implausible and unlikely
Both words in one sentence
- There were different grades of spells, ranging from "likely" through "unlikely" and "wildly improbable" to "completely impossible."
Source: Winds of Destiny, Change - Improbable Aiming Skills: Center can do things to your perceptions, just starting with overlaying gunsights on your vision, that make unlikely shots rather more likely.
Source: Literature / The General -
The technique of using improbable or seemingly unlikely devices for serious technology is actually used on a smaller scale in real life.
Source: Off-the-Shelf FX
Cite this Source
Unlikely and Improbable. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/improbable/unlikely
Improbable & Unlikely. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/improbable/unlikely>.
Unlikely or Improbable. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/improbable/unlikely.
Google Ngram Viewer shows how "improbable" and "unlikely" have occurred on timeline