ARBOROUS is a playable word

arborous Scrabble® Dictionary

adjective
pertaining to trees
89 Playable Words can be made from "ARBOROUS"
   2-Letter Words (9 found)
   3-Letter Words (30 found)
   5-Letter Words (11 found)
   6-Letter Words (4 found)
   7-Letter Words (1 found)
   8-Letter Words (1 found)