Fraternity

The state or quality of being fraternal or brotherly; brotherhood.

A body of men associated for their common interest, business, or pleasure; a company; a brotherhood; a society; in the Roman Catholic Chucrch, an association for special religious purposes, for relieving the sick and destitute, etc.

Men of the same class, profession, occupation, character, or tastes.

people engaged in a particular occupation; "the medical fraternity"