What It Scores
REDS is a valid word in the tournament list this site uses. Tile values only, before any premium square: 5 in Scrabble, 5 in Words With Friends, 5 in Wordfeud. The letters break down as R1 E1 D2 S1.
Words Made From The Letters In REDS
11 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.
3 letter words (6)
2 letter words (5)
Longer Words Containing REDS
REDS 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.