What It Scores
PLAID is a valid word in the tournament list this site uses. Tile values only, before any premium square: 8 in Scrabble and 9 in Words With Friends. The letters break down as P3 L1 A1 I1 D2.
Words Made From The Letters In PLAID
32 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.
4 letter words (9)
3 letter words (13)
2 letter words (10)
Longer Words Containing PLAID
PLAID appears inside each of these, which is what makes it worth knowing as a hook.
Next: the Word Unscrambler for any letters at all. Full entry and definition at Merriam-Webster.