In English, there is only one - friend.
(for other languages, see the related question)
which or witch
There are 3 ways to spell the word "shell" - shell, she'll, and SHL.
One.
That is the only way to correctly spell it in English
just the one...
DA is not a word so there are no spellings for it.
While there may be many ways to misspell "scissor," in English, there is only one way to spell it correctly: s-c-i-s-s-o-r.
There is only one way to spell the word "lie".
Only one way correctly: jump.
The word can be correctly spelled Hannover and Hanover.
There is only one English spelling of the word "strong."
There is only one correct spelling of that word: honor