periderm /perˈi-dûrm/

1. The horny cuticular covering of a hydroid colony
2. The cork cambium with the cork and other tissues derived from it, forming a protective outer covering in plants

• swordbills
• sword-blade
• sword-blades
• sword-breaker
• sword-breakers
• sword-cane
• sword-canes
• swordcraft
• swordcrafts
• sword-cut
• sword-cuts
• sword dance
• sword dances
• sword-dollar
• sword-dollars
• sworded
• sworder
• sworders
• sword fern
• sword ferns
• swordfish
• swordfishes
• sword grass
• sword grasses
• sword-guard