GREBES is a playable word

grebe Scrabble® Dictionary

noun
pl. grebes
a diving bird
40 Playable Words can be made from "GREBES"
   2-Letter Words (4 found)
   3-Letter Words (13 found)
   4-Letter Words (14 found)
   5-Letter Words (8 found)
   6-Letter Words (1 found)