hemisphere (n.)

• ambit
• arena
• bailiwick
• beat
• border
• borderland
• circle
• circuit
• demesne
• department
• domain
• dominion
• field
• half
• half-and-half
• jurisdiction
• march
• mediety
• moiety
• orb
• orbit
• pale
• precinct
• province
• realm
• round
• semicircle
• sphere
• walk