1. Without mercy or pity
   - pitiless, remorseless, ruthless

See also: merciless, unmerciful

• Richardson ground squirrel
• Richardson vole
• Richardson's geranium
• Richea
• Richea dracophylla
• Richea pandanifolia
• Richelieu
• riches
• Richler
• richly
• Richmond
• Richmondena
• Richmondena Cardinalis
• richness
• Richter scale
• richweed
• ricin
• ricin toxin
• ricinoleic acid
• Ricinus
• Ricinus communis
• rick
• Rickenbacker
• ricketiness
• rickets