bimillenary /bī-milˈi-nə-ri/

1. A period of 2000 years
2. A 2000th anniversary

1. Happening every 2000 years
2. Relating to a 2000th anniversary

• ballistic
• ballistic missile
• ballistic missiles
• ballistic pendulum
• ballistic pendulums
• ballistics
• ballistite
• ballistites
• ballistocardiogram
• ballistocardiograms
• ballistocardiograph
• ballistocardiography
• ballium
• balliums
• ball lightning
• ball mill
• ball mills
• ballocks
• ballocksed
• ballockses
• ballocksing
• ball of fire
• ballon
• ballon d'essai
• ballonet