Unfortunately, the Hebrew language doesn't. The word ach (or akh) can mean anything from a brother of the same parents to one of the parents (half brother) to kinship (cousins) and even members of the same tribe.
But, it's not whether a word exists or not that matters onbly, but also what the existing word means (the range of menaings).
The Greek word adelfos (adlephos) can mean brother of the same parents, or one of the parents (half brother), kin, etc.
You will have to find, as Campion points out, an actual biblical refreences that says "Mary's sons" in order to definitively draw a conclusion that she did in fact have other children of her own.
Uh huh...Sure...I also didn't find a verse that says Mary did not take the subway to and from the Synagogue...Does that mean~~~~???
Hey, God says stay away from that 'Queen of Heaven' stuff, stay away from worshipping goddesses, don't eat those little cookies, etc...Stay away from a religion that has priests wearing long robes...Stay away from that religion that forbids marriage...Do not even build graven images, let alone pray to them...God told Peter to let us know that Apostles don't allow people to bow in front of them...God warned us about religions that corrupt the word of God...
You don't have to be a mental giant to see that God warned us about Your religion...