What It Scores
ATTABOY is a valid word in the tournament list this site uses. Tile values only, before any premium square: 12 in Scrabble and 13 in Words With Friends. The letters break down as A1 T1 T1 A1 B3 O1 Y4.
At seven letters this plays a whole rack, which is a bingo and worth 62 in Scrabble once the 50 point bonus lands.
Words Made From The Letters In ATTABOY
43 shorter words come out of these tiles. On a board that matters more than the long play, because a short word on a premium square often beats a long one on plain squares.
5 letter words (3)
4 letter words (8)
3 letter words (19)
2 letter words (13)
Next: the Word Unscrambler for any letters at all. Full entry and definition at Merriam-Webster.