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Posthaste has 49 synonyms. The top synonyms for posthaste are quick, swift, quickly, hell for leather, amain, speedily, by express, express and 41 more. Another word for posthaste is quick. Browse the full list below.
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| Random | DefinitionA common synonym for posthaste is quick. Other synonyms include swift, quickly, hell for leather, amain.
Posthaste has 49 synonyms listed on Thesaurasize.
(v): quickly, as fast as someone travelling post; with great speed Example: "it is imperative that you finish your task posthaste."
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