Unheard-of and Unprecedented

Unheard-of

Unheard-of adjective - Not known or experienced before.
Usage example: houses selling at unheard-of prices

Unprecedented is a synonym for unheard-of in unique topic. In some cases you can use "Unprecedented" instead an adjective phrase "Unheard-of". popular alternative

Unprecedented

Unprecedented adjective - Not known or experienced before.
Usage example: this is an unprecedented request for the reference desk

Unheard-of is a synonym for unprecedented in exceptional topic. You can use "Unheard-of" instead an adjective "Unprecedented". popular alternative
Cite this Source
Unprecedented and Unheard-of. (2016). Retrieved 2026, July 31, from https://thesaurus.plus/related/unheard-of/unprecedented
Unheard-of & Unprecedented. N.p., 2016. Web. 31 Jul. 2026. <https://thesaurus.plus/related/unheard-of/unprecedented>.
Unprecedented or Unheard-of. 2016. Accessed July 31, 2026. https://thesaurus.plus/related/unheard-of/unprecedented.