• errens,
• darrens,
• bargans,
• airens,
• barins,
• barrells,
• barredas,
• barrers,
• barreks,
• barrals,
• barran,
• barrles,
• barrecks,
• berren,
• barrets,
• barreness,
• burrend,
• bariels,
• grrens,
• aarrons

• barnacled,
• barranco,
• bar mask,
• barnas,
• barnacle,
• barringer,
• baranowski,
• barring,
• barong,
• baringer,
• barrenness,
• bareness,
• Barnick,
• Barnes,
• barnstorm,
• barnhouse,
• baronage,
• barn grass,
• baring,
• baroness,
• barns.

The adjective form of the word "barrens" is "barren".