Failure
Slip up
Slip up verb - To make a mistake.
Mutual synonyms
Both terms in one sentence
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If not for Ben's slip up to one of Glory's minions (and subsequent failure to kill said minion), she may never have found out in time.
Source: Hidden in Plain Sight -
Inferiority Superiority Complex: Twilight's perfectionism and smug assurance of her friends needing her help hides her deeply scarred woes over being branded a failure for so much as one slip up.
Cite this Source
Slip up and Failure. (2016). Retrieved 2026, August 03, from https://thesaurus.plus/related/failure/slip_up
Failure & Slip up. N.p., 2016. Web. 03 Aug. 2026. <https://thesaurus.plus/related/failure/slip_up>.
Slip up or Failure. 2016. Accessed August 03, 2026. https://thesaurus.plus/related/failure/slip_up.
Google Ngram Viewer shows how "failure" and "slip up" have occurred on timeline