EXCELS is a playable word

excel Scrabble® Dictionary

verb
excelled, excelling, excels
to surpass others
25 Playable Words can be made from "EXCELS"
   2-Letter Words (3 found)
   3-Letter Words (10 found)
   4-Letter Words (8 found)
   5-Letter Words (3 found)
   6-Letter Words (1 found)