«الْفُجُورُ»: wickedness, the name of an act or quality.
«فَجَارِ»: a definite verbal noun expressing that meaning.
«نَزَالِ»: an imperative verb-noun meaning 'descend!'
Sharing the morphological pattern does not make them the same class.
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Verbal Noun versus Verb-Noun
Asmāʾ al-Afʿāl — Definition, Uses and Parsing
«الْفُجُورُ»: wickedness, the name of an act or quality.
«فَجَارِ»: a definite verbal noun expressing that meaning.
«نَزَالِ»: an imperative verb-noun meaning 'descend!'
Sharing the morphological pattern does not make them the same class.