warranted, certified, bonded, secured, endorsed, insured, pledged, vouched for, plighted, confirmed, assured, ascertained, approved, attested, sealed, certificated, protected, on ice, affirmed, sure-fire*.
Antonyms unsupported, anonymous*, unendorsed.
"guaranteed." YourDictionary, n.d. Web. 05 December 2018. <https://thesaurus.yourdictionary.com/guaranteed>.
guaranteed. (n.d.). Retrieved December 05th, 2018, from https://thesaurus.yourdictionary.com/guaranteed
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