Synonyms of post-haste in English:

post-haste

adverb

  • he departed post-haste for Venice
    as quickly as possible, without delay, (very) quickly, speedily, swiftly, without further/more ado, with all speed, promptly, immediately, at once, straight away, right away, directly, forthwith
    informal double quick, p.d.q. (pretty damn quick), pronto, before you can say Jack Robinson, straight off
  • Definition of post-haste in:

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    Word of the day anastrophe
    Pronunciation: əˈnastrəfi
    noun
    the inversion of the usual order of words...