客 - guest, visitor, customer

objectivity; objective; object (philosophical)

customer satisfaction

guest; visitor

guest seating (e.g. theater, stadium); passenger seat (e.g. taxi)

passenger

passenger plane

guest of honour; guest of honor; privileged guest; visitor

visitor; caller

spectator; audience

drawing room; parlor; parlour; guest room

guest room (at a hotel); guest cabin (on a boat); passenger cabin (on a plane)

controversialist; polemic; disputant