LUMBER is a playable word

lumber Scrabble® Dictionary

verb
lumbered, lumbering, lumbers
to cut down and prepare timber for market
43 Playable Words can be made from "LUMBER"
   2-Letter Words (8 found)
   3-Letter Words (14 found)
   4-Letter Words (11 found)
   5-Letter Words (8 found)
   6-Letter Words (2 found)