1. A unique or strikingly different one of its kind
   - doozie [N. Amer]

Encyclopedia: Doozy

• Oligoplites
• oligopoly
• Oligoporus
• Oligoporus leucospongia
• oligopsony
• oligosaccharide
• oligospermia
• oligotrophic
• oliguria
• Olimbos
• olio
• olivaceous
• olive
• olive branch
• olive drab
• olive family
• olive oil
• olive ridley
• olive tree
• olive-brown
• olive-colored
• olive-coloured
• olive-drab uniform
• olive-gray
• olive-green