MOBBER is a playable word

mobber Scrabble® Dictionary

noun
pl. mobbers
one that mobs
36 Playable Words can be made from "MOBBER"
   2-Letter Words (10 found)
   3-Letter Words (14 found)
   4-Letter Words (6 found)
   5-Letter Words (4 found)
   6-Letter Words (2 found)