VASTS is a playable word

vast Scrabble® Dictionary

adjective
vaster, vastest
of great extent or size
noun
pl. vasts
a vast space
15 Playable Words can be made from "VASTS"
   2-Letter Words (3 found)
   3-Letter Words (7 found)
   4-Letter Words (4 found)
   5-Letter Words (1 found)