sexennial /sek-senˈyəl or -senˈi-əl/

1. Lasting six years
2. Recurring every six years

• shockers
• shock-head
• shock-headed
• shock-heads
• shock horror
• shock-horror
• shocking
• shockingly
• shockingness
• shockingnesses
• shocking pink
• shocking pinks
• shock jock
• shock jocks
• shockproof
• shocks
• shockstall
• shockstalls
• shock tactics
• shock therapies
• shock therapy
• shock treatment
• shock troops
• shockumentaries
• shockumentary