A sphere of influence is a geographical AREA or region in which a particular power or group has a significant amount of control or influence. The crossword solutions for this term are ORBIT (5 letters), DOMAIN (6 letters), AMBIT (5 letters), ARENA (5 letters), AREA (4 letters), REALM (5 letters), and POWERBASE (9 letters). Each of these words can be used to describe a sphere of influence, with ORBIT referring to the boundaries of the AREA, DOMAIN referring to the AREA of control, AMBIT referring to the scope of the influence, ARENA referring to the place where the influence is exerted, AREA referring to the size of the AREA, REALM referring to the DOMAIN of the influence, and POWERBASE referring to the source of the influence.