1. 
   impressively
   [adv] - in an impressive manner
   Found op http://www.webdictionary.co.uk/definition.php?query=impressively
   
   
2. 
   impressively
   imposingly adverb in an impressive manner; `the students progressed impressively fast`
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=impressively
   
   
3. 
   impressively
   1) Arrestingly 2) Commandingly 3) Dauntingly 4) Grandly 5) Imposingly 6) In an impressive manner 7) Magnificently 8) Strikingly
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/impressively/1
   
   

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