def highlight_for_word(text, words, color)
    return text if (text =~ /#{words.join('|')}/i).nil?
    color = 'yellow'
    replacement = '</w:t></w:r><w:r><w:rPr><w:highlight w:val="' + color + '"/></w:rPr><w:t>\1</w:t></w:r><w:r><w:t>'
    words.each do |word|
      raise text.gsub(/(#{word})/, replacement)
    end
    text
  end