NAFAL is a term that is frequently used in Islamic worship. It refers to optional prayers that Muslims can perform outside of the five daily prayers. However, there are several synonyms that can be used interchangeably in place of NAFAL. For example, the word "SUNNAH" is an Arabic term that also refers to optional prayers. Another synonym is "DAWUDI," which is a term used by some communities to refer to voluntary prayers. Additionally, the term "NADR" can be used to refer to optional prayers, especially when making a vow to God. Other synonyms for NAFAL include mustahab, tatawwu, and rafl. Each of these terms refers to the same concept of optional prayers outside of the mandatory five daily prayers.