Flunk
Flunk verb - To be unsuccessful.
Usage example: the movie flunks, both as entertainment and as a dramatization of a historical incident
Slip
Slip verb - To decline gradually from a standard level.
Cite this Source
Slip and Flunk. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/flunk/slip
Flunk & Slip. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/flunk/slip>.
Slip or Flunk. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/flunk/slip.
Google Ngram Viewer shows how "flunk" and "slip" have occurred on timeline