BIOASSAYING is a playable word

bioassay Scrabble® Dictionary

verb
bioassayed, bioassaying, bioassays
to test a substance (as a drug) in order to determine its strength
302 Playable Words can be made from "BIOASSAYING"
   2-Letter Words (25 found)
   8-Letter Words (7 found)
   11-Letter Words (1 found)