vicennial /vī-senˈyəl/

1. Lasting, or coming at the end of, twenty years
2. Occurring every twenty years

• talkie
• talkier
• talkies
• talkiest
• talk-in
• talking
• talking book
• talking books
• talking head
• talking heads
• talking machine
• talking machines
• talking of
• talking point
• talking points
• talkings
• talking shop
• talking shops
• talking-to
• talk-ins
• talk like a book
• talk like a Dutch uncle
• talk like a pen-gun
• talk of the devil
• talk out