homophones

Just as different sounding words may have the same soundex, the reverse situation can also occur: words that sound identical, called homophones, may have different codes.

正如发音不同的单词有可能有相同的 soundex，反过来的情况也有可能发生：发音相同的单词，叫做 同音词（homophone），可能有不同的代码。