SWELTER is a playable word

swelter Scrabble® Dictionary

verb
sweltered, sweltering, swelters
to suffer from oppressive heat
105 Playable Words can be made from "SWELTER"
   2-Letter Words (8 found)
   3-Letter Words (23 found)
   6-Letter Words (5 found)
   7-Letter Words (3 found)