octennial /ok-tenˈyəl, -i-əl/

1. Happening every eighth year
2. Lasting eight years

• universally
• universalness
• universalnesses
• universal quantifier
• universal quantifiers
• universal recipient
• universal recipients
• universals
• universal set
• universal time
• universal times
• universe
• universe of discourse
• universes
• universitarian
• universities
• university
• university extension
• university of the air
• univocal
• univocally
• univocals
• univoltine
• Unix
• unjaded