What is a another way of spelling tail?

There isn't really another common spelling for "tail". It's a pretty straightforward word!

However, if you're looking for a more informal or slang way to refer to a tail, you could use words like:

* Rear end

* Backside

* Behind

* Butt (informal)

* Rump (informal)

Keep in mind that some of these terms can be considered rude or offensive depending on the context.