سِنُونَ — مُسْلِمُونَ
Muslimūna is a regular sound masculine plural. Sinūna is an exceptional attested form; identical-looking endings do not establish identical derivation.
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Regular Rule versus Attested Exception
Plural Nouns: Sound, Broken, Paucity and Abundance
سِنُونَ — مُسْلِمُونَ
Muslimūna is a regular sound masculine plural. Sinūna is an exceptional attested form; identical-looking endings do not establish identical derivation.