environment - the totality of surrounding conditions; "he longed for the comfortable environment of his livingroom"

distaff - the sphere of work by women

front - a sphere of activity involving effort; "the Japanese were active last week on the diplomatic front"; "they advertise on many different fronts"

kingdom, realm, land - a domain in which something is dominant; "the untroubled kingdom of reason"; "a land of make-believe"; "the rise of the realm of cotton in the south"

lap - an area of control or responsibility; "the job fell right in my lap"

political arena, political sphere - a sphere of intense political activity

preserve - a domain that seems to be specially reserved for someone; "medicine is no longer a male preserve"

province, responsibility - the proper sphere or extent of your activities; "it was his province to take care of himself"

country, land, state - the territory occupied by a nation; "he returned to the land of his birth"; "he visited several European countries"

archduchy - the domain controlled by an archduke or archduchess

barony - the domain of a baron

duchy, dukedom - the domain controlled by a duke or duchess

earldom - the domain controlled by an earl or count or countess

emirate - the domain controlled by an emir

empire - the domain ruled by an emperor or empress

fiefdom - the domain controlled by a feudal lord

grand duchy - the domain controlled by a grand duke or grand duchess

viscounty - the domain controlled by a viscount or viscountess

khnate - the realm of a khan

kingdom, realm - the domain ruled by a king or queen

principality, princedom - territory ruled by a prince

Kingdom of God - the domain over which God is spiritually sovereign

sheikdom, sheikhdom - the domain ruled by a sheik

suzerainty - the domain of a suzerain

region - a large indefinite location on the surface of the Earth; "penguins inhabit the polar regions"

set - (mathematics) an abstract collection of numbers or symbols; "the set of prime numbers is infinite"

class, social class, socio-economic class - people having the same social or economic status; "the working class"; "an emerging professional class"

academe, academia - the academic world

Grub Street - the world of literary hacks

knowledge base, knowledge domain - the content of a particular domain or field of knowledge