SUBBASIN is a playable word

subbasin Scrabble® Dictionary

noun
pl. subbasins
a section of an area drained by a river
95 Playable Words can be made from "SUBBASIN"
   2-Letter Words (13 found)
   3-Letter Words (29 found)
   6-Letter Words (3 found)
   8-Letter Words (1 found)