territory

nouns

a region marked off for administrative or other purposes
district, dominion, territorial dominion, territory
is derived from
territorial
an area of knowledge or interest
"his questions covered a lot of territory"
territory
is a type of (narrower)
a subject of study
"it was his area of specialization"; "areas of interest include..."
area
the geographical area under the jurisdiction of a sovereign state
"American troops were stationed on Japanese soil"
soil, territory
is derived from
territorial