1. 
   post-haste
   [adv] - as fast as possible
   Found op http://www.webdictionary.co.uk/definition.php?query=post-haste
   
   
2. 
   post-haste
   adverb as fast as possible; with all possible haste; `send it to me post-haste`
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=post-haste
   
   
3. 
   Posthaste
   Post`haste' noun Haste or speed in traveling, like that of a post or courier. Shak.
   Found op http://www.encyclo.co.uk/webster/P/134
   
   
4. 
   Posthaste
   Post`haste adverb With speed or expedition; as, he traveled posthaste ; to send posthaste . Shak.
   Found op http://www.encyclo.co.uk/webster/P/134
   
   
5. 
   Posthaste
   • (adv.) With speed or expedition; as, he traveled posthaste; to send posthaste. • (n.) Haste or speed in traveling, like that of a post or courier.
   Found op http://thinkexist.com/dictionary/meaning/posthaste/
   
   
6. 
   posthaste
   1) As soon as possible 2) Immediately 3) P.d.q. 4) Quickly
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/posthaste/1
   
   

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