biennial /bī-enˈi-əl or -enˈyəl/

1. Lasting two years
2. Happening or appearing once in two years

1. A plant that flowers and fruits only in its second year, then dies
2. An event taking place or being celebrated every two years

• other
• other-directed
• other gates
• othergates
• other guess
• otherguess
• otherness
• othernesses
• other ranks
• others
• other things being equal
• otherwhere
• otherwhile
• otherwhiles
• otherwise
• otherworld
• otherworldish
• otherworldliness
• otherworldly
• otherworlds
• otic
• otiose
• otiosely
• otioseness
• otiosenesses