Said of people, manners, etc.

countrified, unsophisticated, rural, rustic, homey, down-home, farm, backwoods, provincial, unpolished, unrefined, uncouth, uncultured, hick*; see also rude 1, rural, rustic 2.

Said of areas

rustic, agrarian, provincial, back-country; see rural.

Rural areas

countryside, farmland, farming district, rural region, rural area, country district, back country, bush, forests, mountains, woodlands, backwoods, sparsely settled areas, the hinterland, the provinces, frontier, wilderness, wilds, outback (Australian), the sticks*, the boondocks, the boonies*; see also farm, forest, range 4.

Antonyms city*, urban area, municipality. *

A nation

sovereign state, realm, land, people; see nation 1.

Land and all that is associated with it

homeland, native land, fatherland, motherland, mother country, patria (Latin), all we hold dear, roots, Vaterland (German), la patrie (French), the flag*, mother and apple pie*.