This is the 11368th most frequent Portuguese word.
muçulmanas
Muslim women.
Here, 'muçulmanas' is used as an adjective modifying 'mulheres' (women) in plural female form to describe them as Muslim.
As mulheres muçulmanas usam véus tradicionais.
Muslim women wear traditional veils.
In this sentence, 'muçulmanas' serves as an adjective modifying 'culturas' (cultures), denoting they are Muslim cultures.
As culturas muçulmanas têm tradições ricas.
Muslim cultures have rich traditions.
Here, 'muçulmanas' is used as an adjective for 'crenças' (beliefs) to indicate beliefs pertaining to Islam, in a plural form to match 'crenças'.