NEMESES is a playable word

nemesis Scrabble® Dictionary

noun
pl. nemeses
a formidable opponent
40 Playable Words can be made from "NEMESES"
   2-Letter Words (5 found)
   3-Letter Words (8 found)
   4-Letter Words (12 found)
   5-Letter Words (10 found)
   6-Letter Words (4 found)
   7-Letter Words (1 found)