docstr: :return: a list of all words defined in the cmudict lexicon.
code: def words(self):
      """
      :return: a list of all words defined in the cmudict lexicon.
      """
      return [word.lower() for (word, _) in self.entries()]
  
file_path: nltk/nltk/corpus/reader/cmudict.py
imports: from nltk.corpus.reader.api import *
  from nltk.corpus.reader.util import *
  from nltk.util import Index
label_desc: Use image node_id 2 for calling the CMUDictCorpusReader obj's underlying member method code with example usage: obj.words() and returns: unknown