Probable and Questionable
Opposite meaning words
Probable
Probable adjective - Worthy of being accepted as true or reasonable.
Usage example: the counselor could find no probable reason for the girl's bizarre actions
Questionable is an antonym for probable.
Questionable
Questionable adjective - Not likely to be true or to occur.
Usage example: it's questionable that he will show up tonight considering all the bad weather we're having
Probable is an antonym for questionable.
Cite this Source
Questionable and Probable. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/probable/questionable
Probable & Questionable. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/probable/questionable>.
Questionable or Probable. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/probable/questionable.
Google Ngram Viewer shows how "probable" and "questionable" have occurred on timeline