Stem نَسُ has 5 unique word forms and appears 11 times in the Quran.

Word Translation Occurrences
نَسُواْ forgot, They forget, they forgot 14
فَنَسُواْ but they forgot 2
نَسُوهُ had forgotten it 2
وَنَسُواْ and forgot 2
وَنَسُوهُۚ while they forgot it 2