BIANNUAL is a playable word

biannual Scrabble® Dictionary

adjective
occurring twice a year
77 Playable Words can be made from "BIANNUAL"
   2-Letter Words (13 found)
   3-Letter Words (25 found)
   5-Letter Words (11 found)
   6-Letter Words (6 found)
   8-Letter Words (1 found)