ARISTAS is a playable word

arista Scrabble® Dictionary

noun
pl. aristas or aristae
a bristlelike structure or appendage
(adjective) aristate
80 Playable Words can be made from "ARISTAS"
   2-Letter Words (10 found)
   3-Letter Words (21 found)
   4-Letter Words (19 found)
   6-Letter Words (8 found)
   7-Letter Words (2 found)