Brotherhood (noun)

1. A group of people who share a common interest, profession, or characteristic, especially men who are members of a fraternity or a trade union.
2. A feeling of camaraderie and mutual support among a group of people.

Origin:

From brother + -hood, first recorded in the 14th century.

Examples:

1. The fraternity was based on brotherhood.
2. The union members felt a strong sense of brotherhood.
3. The athletes on the team felt a strong sense of brotherhood.
4. The soldiers felt a strong sense of brotherhood.
5. The firefighters had a strong sense of brotherhood.