If you need to find words based on approximate pronounciation, use Metaphone (or similar); don’t use Soundex.
The Soundex algorithm was invented before 1880 (yes, 1880). It worked well for what it was designed for: their database was a set of large boxes containing rolls of microfilm and/or paper cards.
Don’t use Soundex in the 21st century! We should have stopped using it in the 20th.