Failed
Vain
Vain adjective - Having too high an opinion of oneself.
Failed and vain are semantically related in unsuccessful topic. You can use "Failed" instead an adjective "Vain".
Mutual synonyms
Both words in one sentence
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He could have his forces stand, fight and die in the vain hope that they can make a difference when an earlier force in optimal condition had failed, or retreat and preserve his strength.
Source: Know When to Fold 'Em -
You Have Failed Me: The Maoh King turns one of his minions into a doll after he brings Maoh King a rather vain and pretentious girl.
Source: Anime / Genma Wars -
The June Rebellion failed, but the revolutionaries didn't die in vain: Louis Philippe was overthrown in 1848, Napoleon III in 1870, and the French Third Republic was established that same year.
Source: Literature / Les Misérables
Cite this Source
Vain and Failed. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/failed/vain
Failed & Vain. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/failed/vain>.
Vain or Failed. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/failed/vain.
Google Ngram Viewer shows how "failed" and "vain" have occurred on timeline