octennial /ok-tenˈyəl, -i-əl/

1. Happening every eighth year
2. Lasting eight years

octennˈially adverb

• jimjams
• jimmied
• jimmies
• jimmy
• Jimmy
• jimmying
• jimmy-o'goblin
• Jimmy Riddle
• Jimmy Woodser
• jimp
• jimper
• jimpest
• jimpier
• jimpiest
• jimply
• jimpness
• jimpnesses
• jimpson weed
• jimpy
• jimson weed
• jimson weeds
• jingal
• jingals
• jingbang
• jingbangs