octingenary /ok-tin-jēˈnə-ri/ or octingentenary /-jen-tēˈnə-ri/

An eight-hundredth anniversary

• long-and-short work
• longanimities
• longanimity
• longanimous
• longans
• long arm
• longas
• Long Barnaby
• longboard
• longboards
• longboat
• longboats
• longbow
• longbows
• long-breathed
• longcase clock
• longcase clocks
• long-chain
• longcloth
• long-clothes
• longcloths
• long-coats
• long corner
• long corners
• long-dated