@vocabulary = Hash.new

@vocabulary["move"]=:move
["go", "travel", "swim", "fly", "wander", "m", "g" ]
  .each do |word| @vocabulary[word]=@vocabulary["move"] end

@vocabulary["attack"]=:attack
["hit", "club", "punch"]
  .each do |word| @vocabulary[word]=@vocabulary["attack"] end

@vocabulary["take"]=:take
["wield", "grab"].each {|w| @vocabulary[w]=@vocabulary["take"] }
def is_synonym(w1, w2)
  @vocabulary[w1] == @vocabulary[w2]
end