BIENNIUMS is a playable word

biennium Scrabble® Dictionary

noun
pl. bienniums or biennia
a period of two years
122 Playable Words can be made from "BIENNIUMS"
   2-Letter Words (16 found)
   6-Letter Words (8 found)
   7-Letter Words (3 found)
   8-Letter Words (1 found)
   9-Letter Words (1 found)