how to cheat at letterpress

cheater.rb

#this uses /usr/share/dict/words, which isn't terribly compatible with letterpress. This is just a proof of concept, please don't cheat. Also, it's fairly slow; there's probably a better way to exclude things quickly.

def list_words(letters, length)
  words = File.read("/usr/share/dict/words").split "\n"
  word_arrays = words.map{|word| word.downcase.split("") }
  accepted_word_arrays = word_arrays.select{|word_array| check_word(word_array, letters, length)}
  words = accepted_word_arrays.map{|word_array| word_array.join("") }.compact
  words.select!{|word| word.length >= length }
  words.sort!{|wa,wb| wa.length <=> wb.length }
end  

def check_word(word_array, letters, length)
  word_array.each do |letter|
    if letters.include? letter 
      letters = letters - [letter]
    else
      return false
    end
  end
  return true
end

puts list_words("vxeiomnaegrygkkzxtsbewtya".split(""), 8)