rectrix /rekˈtriks/

1. A female governor (rare)
2. A bird's long tail feather, used in steering

• boattails
• boat train
• boat trains
• bob
• boba
• bobac
• bobacs
• Bobadil
• bobak
• bobaks
• bob-apple
• bob-apples
• bobas
• bobbed
• bobber
• bobberies
• bobbers
• bobbery
• bobbies
• bobbin
• bobbinet
• bobbinets
• bobbing
• bobbin lace
• bobbin laces