Synonyms for improbable
- adjective
Synonyms by meaning
Adjective
1. Unlikely
2. Incredible
incredible, marvelous US, marvellous UK, tall
Other
Definitions
- adj. 1
Not likely to be true.
It's highly improbable that aliens abducted you.
- adj. 2
Not likely to happen.
Due to the loss of power, it is improbable that we will begin on time.
Related words
- Word family
- improbability improbableness improbably impossible
Example sentences
- unlikely I still think it's unlikely that he'll come today.
- unbelievable It's unbelievable that Tom supports that dictator.
- implausible That Richa can read minds is implausible, to say the least.
- unconvincing The proof Tom provided was unconvincing.
- incredible It's incredible how long Mary can hold her breath!
- doubtful It's doubtful whether Tom will be able to do that.
Popularity over time
| Word | 1850 → 2019 | Trend |
|---|---|---|
| improbable | falling | |
| unlikely | steady | |
| unbelievable | rising | |
| implausible | rising | |
| unconvincing | steady | |
| incredible | rising |
Use in printed books, per decade from 1850 to 2019.
By length
- 4 letters
- tall1
- 5 letters
- fishy2
- 8 letters
- unlikely3, doubtful2
- 9 letters
- marvelous3
- 10 letters
- incredible4, marvellous3
- 11 letters
- implausible4, untruthlike
- 12 letters
- unbelievable5, unconvincing4
- 13 letters
- inverisimilar
The small number after each word is its number of syllables (fishy2 = 2 syllables).
In other languages
- Français
- invraisemblable