ROSTRUMS is a playable word

rostrum Scrabble® Dictionary

noun
pl. rostrums or rostra
a beaklike process or part
106 Playable Words can be made from "ROSTRUMS"
   2-Letter Words (10 found)
   3-Letter Words (25 found)
   6-Letter Words (7 found)
   7-Letter Words (1 found)
   8-Letter Words (1 found)