Comrade (noun)

1. A companion or colleague, especially in a political context.
2. A person with whom one shares a common occupation or interest.

Origin:

Mid 16th century: from french camarade, based on latin camara "chamber" (in medieval latin "companion").

Examples:

1. He was a loyal comrade in the struggle for freedom.
2. She was a trusted comrade in the fight for justice.
3. The soldier was a brave comrade on the battlefield.
4. The worker was a dedicated comrade on the job.
5. The student was a hardworking comrade in the classroom.