SONOBUOY is a playable word

sonobuoy Scrabble® Dictionary

noun
pl. sonobuoys
a buoy that detects and transmits underwater sounds
67 Playable Words can be made from "SONOBUOY"
   2-Letter Words (11 found)
   3-Letter Words (25 found)
   5-Letter Words (8 found)
   8-Letter Words (1 found)