ferrule /ferˈool, -əl/

1. A metal band, ring or cap on the tip of a stick, etc for reinforcing it
2. A threaded cylindrical fitting for joining two pipes or rods

• self-observations
• self-occupied
• self-offence
• self-opening
• self-operating
• self-opinion
• self-opinionated
• self-opinionative
• self-opinioned
• self-opinions
• self-ordained
• self-parodies
• self-parody
• self-perpetuating
• self-perpetuation
• self-pious
• self-pity
• self-pitying
• self-pityingly
• self-planted
• self-pleasing
• self-poised
• self-pollinated
• self-pollination
• self-pollution