There are several synonyms that are commonly used for the word "Arafat". One of the most common synonyms is the phrase "Mount Arafat" which refers to a holy site in Islam where Prophet Muhammad delivered his famous sermon. Another synonym is the "Day of Arafat" which is a very important day in the Islamic calendar. It is believed that on this day, Allah forgives the sins of those who observe fasting. "Arafah" is another synonym which is the name of a plain surrounding the Mount Arafat. "Hiraa" is also a synonym as it is the name of the cave where Prophet Muhammad received his first revelation. These synonyms are often used in Islamic literature, sermons and conversations.