The correct spelling of the word for a type of seasoning is "black pepper". However, some people may mistake it for "wall pepper". This could be due to a mishearing or mispronunciation of the word. In IPA phonetic transcription, "black pepper" is written as /blæk ˈpɛpər/, while "wall pepper" would be written as /wɔl ˈpɛpər/. It is important to use the correct spelling to avoid confusion and ensure clear communication.