What It Scores
KATYDID is a valid word in the tournament list this site uses. Tile values only, before any premium square: 16 in Scrabble and 16 in Words With Friends. The letters break down as K5 A1 T1 Y4 D2 I1 D2.
At seven letters this plays a whole rack, which is a bingo and worth 66 in Scrabble once the 50 point bonus lands.
Words Made From The Letters In KATYDID
55 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 (2)
4 letter words (16)
3 letter words (23)
2 letter words (14)
Next: the Word Unscrambler for any letters at all. Full entry and definition at Merriam-Webster.