The word “downtown” is the name for the traditional center of a city or town. Usually the downtown area contains the city’s business district. So a city’s downtown is its main commercial area.
The word rural describes an area that contains mostly farmland and countryside. A rural area is the area located outside of towns and cities.
The outskirts of a city or town are the areas at the outer edges of that city or town. The outskirts of a city are the parts farthest away from the city’s center.
Suburb is a town or city that is very close to a much bigger city; people who live in the suburbs often travel to the big city for work, shopping, events, or gatherings. A suburb a residential area that is nearby a city.