هذا يوم الفصل الذي كنتم به تكذبون

هَـٰذَا يَوْمُ ٱلْفَصْلِ ٱلَّذِى كُنتُم بِهِۦ تُكَذِّبُونَ

Allah gives 20 different names for the Day of Judgement in the Quran! About this, Imam al-Qurtubi said:
'Anything that is great has a many descriptions and names; this was part of the oral tradition of the Arabs. Consider how important the sword is to them, and how beneficial they would consider it to be in their lives. They have five hundred names for it! Because of how important the Day of Resurrection is, and how plentiful its terrors are, Allah, the Exalted, called it by many names in His scripture, and mentioned many descriptions for it' (Source: at-Tadhkirah). 