TERCET is a playable word

tercet Scrabble® Dictionary

noun
pl. tercets
a group of three lines of verse
21 Playable Words can be made from "TERCET"
   2-Letter Words (4 found)
   3-Letter Words (8 found)
   4-Letter Words (6 found)
   5-Letter Words (2 found)
   6-Letter Words (1 found)