Synonyms of discredited
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obsoleteSomething that is obsolete is no longer needed because something better has been invented.
• The company says the plant is obsolete and does not merit further investment.
outdatedoldpasséancientantiqueold-fashioneddateddiscardedextinctpast itout of datearchaicdisusedout of fashionoutantiquatedanachronisticoutmodedmustyold hatbehind the timessuperannuatedantediluvianoutworndémodéout of the ark (informal)vieux jeu
outwornIf you describe a belief or custom as outworn, you mean that it is old-fashioned and no longer has any meaning or usefulness.
• stubbornly clinging to outworn traditions
Thesaurus for discredited from the Collins English Thesaurus