1 verse has
وَأَمَرُّ
in Edition Uthmani / Al-Qamar (The Moon)

46:54بَلِ ٱلسَّاعَةُ مَوْعِدُهُمْ وَٱلسَّاعَةُ أَدْهَىٰ وَأَمَرُّ