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

• tool up
• toom
• too many irons in the fire
• toomed
• toomer
• toomest
• tooming
• tooms
• too much
• too much for
• too much of a good thing
• toon
• to one's cost
• to one's face
• to one's fingertips
• to one's hand
• to one's heart's content
• to one's knowledge
• to one's name
• to one's taste
• toonie
• toonies
• toons
• to order
• toorie