Language:
* Punjabi (most common and straightforward)
* Panjabi (alternative spelling, less common)
Ethnicity:
* Punjabi (most common)
* Sikh (sometimes used, as a large portion of Punjabis are Sikh, but not all Sikhs are Punjabi)
Other options:
* People of Punjab (formal and specific)
* Punjabis (plural form, used to refer to multiple people)
It's important to be aware of the context and choose the most appropriate term. For example, if you are discussing the Punjabi language, you would use "Punjabi." If you are referring to people of Punjabi origin, you would use "Punjabi" or "Punjabis."