ATTABOY is a playable word

attaboy Scrabble® Dictionary

noun
pl. attaboys
an expression of encouragement or approval to a man or boy
37 Playable Words can be made from "ATTABOY"
   2-Letter Words (12 found)
   3-Letter Words (17 found)
   4-Letter Words (6 found)
   5-Letter Words (1 found)
   7-Letter Words (1 found)