FLUSTERING is a playable word

fluster Scrabble® Dictionary

verb
flustered, flustering, flusters
to put into a state of nervous confusion
787 Playable Words can be made from "FLUSTERING"
   2-Letter Words (22 found)
   3-Letter Words (99 found)
   9-Letter Words (2 found)
   10-Letter Words (1 found)