* Teepee: This spelling is often used in informal contexts.
* Tipi: This spelling is more commonly used in formal writing and publications.
* Tepee: This spelling is also used, though less frequently than the others.
It's important to note that the spelling of "tipi" has evolved over time, and there is no one "correct" way to spell it. However, "tipi" is generally considered the most accurate and preferred spelling.