The word "wiswall" is a bit tricky when it comes to spelling. Its proper pronunciation is /ˈwɪzwɔːl/, which might lead one to believe that it is spelled with two "z's". However, the correct spelling is actually with two "s's": "wiswall". The reason for this is that the "z" sound is represented by the letter "s" in this case due to the specific combination of letters in the word. So, if you want to spell "wiswall" correctly, just remember to use two "s's"!