Unbelievable and Unconceivable

Unbelievable

Unbelievable adjective - Too extraordinary or improbable to believe.
Usage example: a completely unbelievable story about why there was lipstick on his collar

Unconceivable and unbelievable are semantically related in likely topic. In some cases you can use "Unconceivable" instead an adjective "Unbelievable".

Nearby Words: unbelieving, unbeliever

Unconceivable

Unconceivable adjective - Too extraordinary or improbable to believe.
Usage example: it's unconceivable that a once-promising actor could end up this way

Unbelievable and unconceivable are semantically related in likely topic. You can use "Unbelievable" instead an adjective "Unconceivable".
Cite this Source
Unconceivable and Unbelievable. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/unbelievable/unconceivable
Unbelievable & Unconceivable. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/unbelievable/unconceivable>.
Unconceivable or Unbelievable. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/unbelievable/unconceivable.
Google Ngram Viewer shows how "unbelievable" and "unconceivable" have occurred on timeline