CONFOCAL is a playable word

confocal Scrabble® Dictionary

adjective
having the same focus or foci
55 Playable Words can be made from "CONFOCAL"
   2-Letter Words (9 found)
   3-Letter Words (15 found)
   5-Letter Words (5 found)
   6-Letter Words (2 found)
   8-Letter Words (1 found)