ACULEUS is a playable word

aculeus Scrabble® Dictionary

noun
pl. aculei
a sharp-pointed part
64 Playable Words can be made from "ACULEUS"
   2-Letter Words (7 found)
   3-Letter Words (22 found)
   5-Letter Words (10 found)
   6-Letter Words (2 found)
   7-Letter Words (1 found)