CLOACA is a playable word

cloaca Scrabble® Dictionary

noun
pl. cloacas or cloacae
a sewer
(adjective) cloacal
18 Playable Words can be made from "CLOACA"
   2-Letter Words (4 found)
   3-Letter Words (5 found)
   4-Letter Words (6 found)
   5-Letter Words (2 found)
   6-Letter Words (1 found)