1. 
   Cooperate
   • (v. i.) To act or operate jointly with another or others; to concur in action, effort, or effect.
   Found op http://thinkexist.com/dictionary/meaning/cooperate/
   
   
2. 
   cooperate
   co-operate, cooperate To work together, act in conjunction (with another person or thing, to an end or purpose, or in some kind of work).
   Found op http://www.wordinfo.info/words/index/info/view_unit/1484/
   
   
3. 
   cooperate
   1) Collaborate 2) Get together 3) Join forces 4) Not work independently 5) Play ball 6) To work or act together for a common purpose 7) Work 8) Work together 9) Work together toward a common end
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/cooperate/1
   
   

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