CURSILLO is a playable word

cursillo Scrabble® Dictionary

noun
pl. cursillos
a type of spiritual retreat (seclusion with a group)
81 Playable Words can be made from "CURSILLO"
   2-Letter Words (9 found)
   3-Letter Words (19 found)
   6-Letter Words (6 found)
   8-Letter Words (1 found)