| unsuccessful(adjective, failing, unsuccessful, arouse bad feelings) | |
| ineffectual(adjective, unsuccessful, arouse bad feelings) | |
| futile(adjective, unsuccessful, arouse bad feelings) | |
| fruitless(adjective, unsuccessful, arouse bad feelings) | |
| flunked(verb, adjective) | |
| abortive(adjective, failing, unsuccessful, arouse bad feelings) | |
| flopped(verb, adjective) | |
| busted | |
| collapsed(verb, adjective) | |
| foiled(adjective, unsuccessful, arouse bad feelings) | |
| frustrated(adjective, unsuccessful, arouse bad feelings) | |
| useless(adjective, unsuccessful, arouse bad feelings) | |
| failing | |
| thwarted(adjective, unsuccessful, arouse bad feelings) | |
| dead in the water | |
| disregarded(verb, neglected) | |
| neglected(verb, neglected) | |
| bungled(verb, adjective, unsuccessful, unproductive) | |
| disappointed | |
| fallen(verb, adjective) |
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| APA | Smart Define. (2016). failed thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/failed/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "failed thesaurus" https://smartdefine.org/failed/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, failed thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/failed/thesaurus/synonyms>. |
| MLA | Smart Define. "failed thesaurus" 24 March 2016. Web. 20 September 2026. <https://smartdefine.org/failed/thesaurus/synonyms> |