JITTER is a playable word

jitter Scrabble® Dictionary

verb
jittered, jittering, jitters
to fidget
23 Playable Words can be made from "JITTER"
   2-Letter Words (6 found)
   3-Letter Words (7 found)
   4-Letter Words (4 found)
   5-Letter Words (4 found)
   6-Letter Words (2 found)