1. 
   gainfully
   [adv] - in a gainful way
   Found op http://www.webdictionary.co.uk/definition.php?query=gainfully
   
   
2. 
   gainfully
   adverb in a gainful way; `are you gainfully employed now?`
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=gainfully
   
   
3. 
   gainfully
   1) Advantageously 2) Beneficially 3) Helpfully 4) In a gainful way 5) Usefully 6) Valuably
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/gainfully/1
   
   

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