1. Small spiny evergreen shrub of western United States and Mexico with minute flowers and bright red berries
   - redberry, red-berry

Type of: buckthorn

• oiler
• oilfield
• oilfish
• oiliness
• oilman
• oilpaper
• oilrig
• oilseed
• oilseed rape
• oilskin
• oilstone
• oilstove
• oily
• oink
• ointment
• Oireachtas
• OIS
• Ojibwa
• Ojibway
• Ojos del Salado
• ok
• oka
• okapi
• Okapia
• Okapia johnstoni