وَهَذِهِ الثَّلَاثَةُ لَيْسَتْ مِنْ أَسْمَاءِ الْأَفْعَالِ
Translation: These three categories are not among the verb-nouns.
They are a definite verbal noun, a feminine epithet, and a feminine proper name.
Thus not every «فَعَالِ» form is a verb-noun.
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The Source’s Explicit Warning
Asmāʾ al-Afʿāl — Definition, Uses and Parsing
وَهَذِهِ الثَّلَاثَةُ لَيْسَتْ مِنْ أَسْمَاءِ الْأَفْعَالِ
Translation: These three categories are not among the verb-nouns.
They are a definite verbal noun, a feminine epithet, and a feminine proper name.
Thus not every «فَعَالِ» form is a verb-noun.