1. Abounding in or bordered by rocky cliffs or scarps
   "the rock-ribbed coast of Maine"
   - rockbound 
2. Tradition-bound and obstinately opinionated
   "rock-ribbed republican"
   - die-hard

See also: inflexible, rough, unsmooth

• rod
• rod cell
• Rod Laver
• rod-shaped
• rodent
• Rodentia
• rodenticide
• rodeo
• rodeo rider
• Rodgers
• Rodhos
• Rodin
• rodlike
• rodman
• Rodney George Laver
• Rodolia
• Rodolia cardinalis
• rodomontade
• Rodrigo Borgia
• Rodya Raskolnikov
• roe
• roe deer
• Roebling
• roebuck
• roentgen