code: public StructuredQueryDefinition word(TextIndex index, String... words) {
      return new WordQuery(index, null, null, null, words);
    }
docs: Matches an element, attribute, JSON property, or field
  that has at least one of the criteria words.
  @param index    the word container
  @param words    the possible words to match
  @return    the StructuredQueryDefinition for the word query