NONPLUSSING is a playable word

nonplus Scrabble® Dictionary

verb
nonplused, nonplusing, nonpluses or nonplussed, nonplussing, nonplusses
to baffle
288 Playable Words can be made from "NONPLUSSING"
   2-Letter Words (19 found)
   8-Letter Words (7 found)
   10-Letter Words (1 found)
   11-Letter Words (1 found)