hillbilly (n.)

• backwoodsman
• boor
• bucolic
• bumpkin
• bushman
• clod
• clodhopper
• clown
• cracker
• farmer
• forester
• frontiersman
• hayseed
• hick
• lout
• mountaineer
• redneck
• rube
• rustic
• woodman
• woodsman
• yokel