LUSTRUM is a playable word

lustrum Scrabble® Dictionary

noun
pl. lustrums or lustra
a ceremonial purification of the population in ancient Rome
31 Playable Words can be made from "LUSTRUM"
   2-Letter Words (4 found)
   3-Letter Words (10 found)
   4-Letter Words (15 found)
   5-Letter Words (1 found)
   7-Letter Words (1 found)