Best guess: If no Suggestions have been found, add all dictionary words that have the same phonetic code as the misspelled word and with the smallest edit distance from the misspelled word.

For these codes, add all dictionary words that have the same phonetic code as the misspelled word and whose edit distance from the misspelled word is less than a given threshold.

Changing these values would change the hash code, which would in turn break any hash table or dictionary that the object happened to be stored in.