Impugnable
Impugnable adjective - Subject to being discredited.
Open and impugnable are semantically related. in questionable topic. In some cases you can use "Open" instead an adjective "Impugnable", when it comes to topics like doubtful, tricky.
Open
Open adjective - Allowing passage without obstruction.
Impugnable and open are semantically related. Sometimes you can use "Impugnable" instead an adjective "Open".
Cite this Source
Open and Impugnable. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/impugnable/open
Impugnable & Open. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/impugnable/open>.
Open or Impugnable. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/impugnable/open.
Google Ngram Viewer shows how "impugnable" and "open" have occurred on timeline