LANDMASS is a playable word

landmass Scrabble® Dictionary

noun
pl. landmasses
a large area of land
91 Playable Words can be made from "LANDMASS"
   2-Letter Words (10 found)
   3-Letter Words (23 found)
   6-Letter Words (6 found)
   7-Letter Words (1 found)
   8-Letter Words (1 found)