SUBCOOLED is a playable word

subcool Scrabble® Dictionary

verb
subcooled, subcooling, subcools
to cool below the freezing point without solidification
258 Playable Words can be made from "SUBCOOLED"
   2-Letter Words (13 found)
   7-Letter Words (8 found)
   8-Letter Words (1 found)
   9-Letter Words (1 found)