code: @Override
      public List<String> similarWordsInVocabTo(String word, double accuracy) {
          List<String> ret = new ArrayList<>();
          for (String s : vocabCache.words()) {
              if (MathUtils.stringSimilarity(word, s) >= accuracy)
                  ret.add(s);
          }
          return ret;
      }
docs: Find all words with a similar characters
  in the vocab
  @param word the word to compare
  @param accuracy the accuracy: 0 to 1
  @return the list of words that are similar in the vocab