Word.ws English Dictionary

Synonyms of impossible

4 similar words · 2 opposite words

Another word for impossible is unfeasible. Other synonyms of impossible are nonpossible, unhappenable and unpossible. The opposite of impossible is possible.

Synonyms and similar words for impossible

adjectiveMore synonyms

Opposite of impossible

adjectiveAntonym(s) of “not able to be done or happen”.

  • possibleAble but not certain to happen; neither inevitable nor impossible.
  • inevitableImpossible to avoid or prevent.

Meaning of impossible

  1. adjective Not possible; not able to be done or happen.
  2. adjective Very difficult to deal with.
  3. adjective Imaginary.

Full definition of impossible

impossible in other languages

Questions about synonyms of impossible

What is another word for impossible?
Impossible has 4 synonyms on Word.ws, such as unfeasible, nonpossible, unhappenable and unpossible.
What is the opposite of impossible?
The opposite of impossible is possible. Other antonyms of impossible are inevitable.
What does impossible mean?
Impossible means not possible; not able to be done or happen.

Source and license

Adapted from Wiktionary: impossible (page history and authors) and the entries of the words listed. Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws grouped the synonyms and antonyms by meaning and added links. Wiktionary data of 2026-09-02.

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