TALLEST is a playable word

tall Scrabble® Dictionary

noun
pl. talls
a garment size for tall persons
adjective
taller, tallest
having great height
105 Playable Words can be made from "TALLEST"
   2-Letter Words (10 found)
   3-Letter Words (29 found)
   6-Letter Words (4 found)
   7-Letter Words (1 found)