BUSIEST is a playable word

busy Scrabble® Dictionary

adjective
busier, busiest
occupied
verb
busied, busying, busies
to make busy
85 Playable Words can be made from "BUSIEST"
   2-Letter Words (11 found)
   3-Letter Words (25 found)
   6-Letter Words (4 found)
   7-Letter Words (2 found)