BIOASSAY is a playable word

bioassay Scrabble® Dictionary

verb
bioassayed, bioassaying, bioassays
to test a substance (as a drug) in order to determine its strength
84 Playable Words can be made from "BIOASSAY"
   2-Letter Words (17 found)
   3-Letter Words (27 found)
   8-Letter Words (1 found)