TUMULUSES is a playable word

tumulus Scrabble® Dictionary

noun
pl. tumuluses or tumuli
a mound over a grave
99 Playable Words can be made from "TUMULUSES"
   2-Letter Words (10 found)
   3-Letter Words (26 found)
   6-Letter Words (6 found)
   7-Letter Words (3 found)
   9-Letter Words (1 found)