Another term for a country house is a manor house. Years ago, manor houses were built surrounded by a boat and drawbridge and inside the main feature was a great hall.
A cottage is one term for a small house in the country.
A derogatory term, country bumpkins
The term "abroad" is commonly used to refer to being in or to another country.
aggression
Patriotism.
Imperalism
Residential rehab.
export hiatus
A Colony.
Immigrants
estate
Rural means pertaining to the countryside.