CUATRO is a playable word

cuatro Scrabble® Dictionary

noun
pl. cuatros
a small guitar of Latin America
55 Playable Words can be made from "CUATRO"
   2-Letter Words (6 found)
   3-Letter Words (28 found)
   4-Letter Words (16 found)
   5-Letter Words (3 found)
   6-Letter Words (2 found)