Have you ever heard someone say, “That is unlikely to happen”? This means the event probably will not happen. For example, if dark clouds fill the sky, you might say, “It is unlikely that we will have a picnic today.” The word unlikely is used when something does not seem likely or has a low chance of happening.
Learning synonyms for unlikely can help you avoid using the same word again and again. Students can use these words in essays and assignments. Bloggers and content writers can make their writing more natural and interesting. Daily English users can also use them to speak more clearly. In this guide, you will learn 25 useful alternatives to unlikely, with simple meanings and examples.
Quick Answer
Some common synonyms for unlikely are improbable, doubtful, doubtful, implausible, questionable, remote, slim, uncertain, unexpected, and unforeseen.
Parts of Speech
| Word | Part of Speech | Simple Meaning |
| Unlikely | Adjective | Not expected to happen |
| Improbable | Adjective | Not likely to happen |
| Doubtful | Adjective | Not certain to happen |
| Implausible | Adjective | Hard to believe |
| Questionable | Adjective | Not certain or believable |
| Remote | Adjective | Very small in chance |
| Slim | Adjective | Very small in amount or chance |
| Uncertain | Adjective | Not known or sure |
| Unexpected | Adjective | Not expected |
| Unforeseen | Adjective | Not known or expected before |
| Impractical | Adjective | Not likely to work well |
| Incredible | Adjective | Very hard to believe |
| Far-fetched | Adjective | Difficult to believe |
| Unconvincing | Adjective | Not strong enough to believe |
| Dubious | Adjective | Not likely or trustworthy |
| Unreliable | Adjective | Not dependable |
| Inconceivable | Adjective | Almost impossible to imagine |
| Impossible | Adjective | Not able to happen |
| Chancy | Adjective | Having a high level of risk |
| Unpredictable | Adjective | Difficult to know beforehand |
| Rare | Adjective | Not common |
| Outlandish | Adjective | Very unusual or hard to believe |
| Speculative | Adjective | Based on guesses |
| Unpromising | Adjective | Showing little hope of success |
| Doubtless* | Adverb | Certainly, not a synonym of unlikely |
1. Improbable
Meaning: Improbable means something is not likely to happen.
Examples:
- It is improbable that the team will win today.
- An early snowfall is improbable this month.
2. Doubtful
Meaning: Doubtful means something is not certain to happen or be true.
Examples:
- It is doubtful that Sara will join us.
- His story sounds doubtful to me.
3. Implausible
Meaning: Implausible means something is difficult to believe.
Examples:
- His excuse seemed implausible.
- The movie has an implausible ending.
4. Questionable
Meaning: Questionable means something may not be true, right, or reliable.
Examples:
- His claim is questionable.
- The plan has some questionable details.
5. Remote
Meaning: Remote means there is only a very small chance of something happening.
Examples:
- There is a remote chance of rain tonight.
- A remote possibility still exists.
6. Slim
Meaning: Slim means there is only a small chance of something happening.
Examples:
- We have a slim chance of finding a taxi.
- Her chances of winning are slim.
7. Uncertain
Meaning: Uncertain means something is not known or sure.
Examples:
- The future of the project is uncertain.
- It is uncertain whether he will come.
8. Unexpected
Meaning: Unexpected means something was not expected to happen.
Examples:
- We received an unexpected visit.
- The team faced an unexpected problem.
9. Unforeseen
Meaning: Unforeseen means something was not known or expected before it happened.
Examples:
- The trip was delayed by unforeseen problems.
- We had to change our plans because of unforeseen events.
10. Impractical
Meaning: Impractical means something is not likely to work well in real life.
Examples:
- Buying a new car every year is impractical.
- His idea sounds interesting but seems impractical.
11. Incredible
Meaning: Incredible means something is very difficult to believe.
Examples:
- His explanation was almost incredible.
- It seems incredible that they finished so quickly.
12. Far-Fetched
Meaning: Far-fetched means something is very difficult to believe.
Examples:
- That sounds like a far-fetched story.
- Her idea seemed far-fetched at first.
13. Unconvincing
Meaning: Unconvincing means something does not give enough reason to believe it.
Examples:
- His answer was unconvincing.
- The excuse sounded unconvincing to everyone.
14. Dubious
Meaning: Dubious means something is doubtful or not easy to trust.
Examples:
- I am dubious about his promise.
- The website makes some dubious claims.
15. Unreliable
Meaning: Unreliable means something or someone cannot be trusted to work or act as expected.
Examples:
- The old car is unreliable.
- The weather forecast can be unreliable.
16. Inconceivable
Meaning: Inconceivable means something is almost impossible to imagine or believe.
Examples:
- It seemed inconceivable that he could finish alone.
- Such a mistake was once inconceivable.
17. Impossible
Meaning: Impossible means something cannot happen or be done.
Examples:
- It is impossible to finish the work in five minutes.
- Winning now seems almost impossible.
18. Chancy
Meaning: Chancy means something has a high risk and may not succeed.
Examples:
- Driving in this storm is chaotic.
- It was a chance decision to travel at night.
19. Unpredictable
Meaning: Unpredictable means something is hard to know or guess before it happens.
Examples:
- The weather here is unpredictable.
- His behavior can be unpredictable.
20. Rare
Meaning: Rare means something does not happen often.
Examples:
- Snow is rare in this city.
- It is rare to see him angry.
21. Outlandish
Meaning: Outlandish means something is very unusual and hard to believe.
Examples:
- He told us an outlandish story.
- Her outlandish idea made everyone laugh.
22. Speculative
Meaning: Speculative means something is based on a guess rather than clear facts.
Examples:
- The report contains speculative ideas.
- His prediction is still speculative.
23. Unpromising
Meaning: Unpromising means something does not seem likely to succeed.
Examples:
- The project had an unpromising start.
- The weather looked unpromising for our picnic.
24. Infeasible
Meaning: Infeasible means something is not practical or possible to do.
Examples:
- The plan is infeasible with our small budget.
- Building the road here may be infeasible.
25. Unlikely to Occur
Meaning: This phrase means something probably will not happen.
Examples:
- A major change is unlikely to occur this year.
- It is unlikely to occur without proper planning.
How to Choose the Right Synonym for Unlikely
Not every synonym for unlikely works in every sentence. The best word depends on the situation.
Use improbability when something has a low chance of happening.
doubt when you are not sure something will happen or is true.
implausible when something is difficult to believe.
remote when the chance is very small.
slim for a very small chance, especially with opportunities or chances.
the unexpected when something happens without being planned or expected.
unpredictable when you cannot easily know what will happen.
impossible when something cannot happen at all.
far-fetched when an idea or story sounds hard to believe.
For example, “There is a slim chance” sounds natural when talking about an opportunity. However, “His story is far-fetched” is better when talking about something that is difficult to believe.
Synonyms for Unlikely in Different Situations
For Writing
Use words such as improbable, doubtful, implausible, questionable, and uncertain in essays and formal writing.
Daily Conversation
Words such as doubtful, slim, unexpected, and impossible are common in everyday English.
Creative Writing
Words like far-fetched, incredible, outlandish, and unpredictable can make descriptions more interesting.
Business Writing
Words such as impractical, infeasible, uncertain, and unpromising can be useful when discussing plans and results.
Frequently Asked Questions
1. What is the best synonym for unlikely?
Improbable is one of the closest synonyms for unlikely. Both words describe something that has a low chance of happening.
2. What is a simple word for unlikely?
A simple alternative is doubtful. It means something is not certain or probably will not happen.
3. Is improbable the same as unlikely?
Yes, improbable and unlikely have very similar meanings. Both describe something that probably will not happen.
4. What is the opposite of unlikely?
The opposite of unlikely is likely or probable. These words describe something that has a good chance of happening.
5. Is doubtful a synonym for unlikely?
Yes. Doubtful can mean that something is not likely to happen or that you are not sure it is true.
6. What is a synonym for unlikely in formal English?
Improbable, implausible, questionable, and infeasible can work in formal writing, depending on the context.
7. What is the difference between unlikely and impossible?
Unlikely means something probably will not happen, but it still can happen. Impossible means something cannot happen.
Conclusion
Learning synonyms for unlikely gives you more ways to express your ideas clearly. Words such as improbable, doubtful, implausible, remote, slim, and uncertain can improve your writing and speaking. They are useful for students, bloggers, content writers, and daily English users. Try using these words in your emails, essays, blog posts, and daily conversations. With regular practice, your vocabulary will become stronger and your English will sound more natural.
Habib Ullah is the founder of LanguagePilots, where he creates easy-to-understand English learning content to help students and professionals build confidence in communication.
