JIBBER is a playable word

jibber Scrabble® Dictionary

noun
pl. jibbers
a horse that jibs
19 Playable Words can be made from "JIBBER"
   2-Letter Words (4 found)
   3-Letter Words (7 found)
   4-Letter Words (5 found)
   5-Letter Words (2 found)
   6-Letter Words (1 found)