1. Seven
   - hepta-

Encyclopedia: Septua-

• grey kingbird
• grey lemming
• grey market
• grey matter
• grey mullet
• grey partridge
• grey polypody
• grey poplar
• grey sage
• grey sea eagle
• grey skate
• grey snapper
• grey sole
• grey substance
• grey whale
• grey willow
• grey wolf
• grey-black
• grey-blue
• grey-brown
• grey-green
• grey-haired
• grey-headed
• grey-leaf pine
• grey-pink