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

• heurisms
• heuristic
• heuristically
• heuristic program
• heuristic programs
• heuristics
• hevea
• hevea rubber
• hew
• hewed
• hewer
• hewers
• hewgh
• hewing
• hewings
• hewn
• hews
• hew to
• hex
• hex-
• hexa-
• hexachlorophane
• hexachlorophene
• hexachord
• hexachords