ONLOOKER is a playable word

onlooker Scrabble® Dictionary

noun
pl. onlookers
a spectator
55 Playable Words can be made from "ONLOOKER"
   2-Letter Words (11 found)
   3-Letter Words (16 found)
   5-Letter Words (5 found)
   6-Letter Words (2 found)
   8-Letter Words (1 found)