vicennial /vī-senˈyəl/

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

• smoked
• smoke detector
• smoke detectors
• smoke-dried
• smoke-dries
• smoke-dry
• smoke-drying
• smoke-filled room
• smoke-filled rooms
• smoke helmet
• smoke helmets
• smoke-ho
• smoke hole
• smoke holes
• smokehood
• smokehoods
• smoke-hos
• smokehouse
• smokehouses
• smoke-jack
• smoke-jacks
• smokeless
• smokeless fuel
• smokeless fuels
• smokelessly