Doubtable and Irrefragable

Doubtable

Doubtable adjective - Open to question or dispute.
Usage example: that his wartime exploit happened at all is very doubtable

Irrefragable is an antonym for doubtable.

Nearby Words: doubt, doubtful, doubting, doubted, doubter

Irrefragable

Irrefragable adjective - Not capable of being challenged or proved wrong.
Usage example: the prosecutor painstakingly built an irrefragable case

Doubtable is an antonym for irrefragable.
Cite this Source
Irrefragable and Doubtable. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/doubtable/irrefragable
Doubtable & Irrefragable. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/doubtable/irrefragable>.
Irrefragable or Doubtable. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/doubtable/irrefragable.
Google Ngram Viewer shows how "doubtable" and "irrefragable" have occurred on timeline