What It Scores
YIRRS is a valid word in the tournament list this site uses. Tile values only, before any premium square: 8 in Scrabble and 8 in Words With Friends. The letters break down as Y4 I1 R1 R1 S1.
Words Made From The Letters In YIRRS
5 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 (1)
3 letter words (2)
2 letter words (2)
Next: the Word Unscrambler for any letters at all. Full entry and definition at Merriam-Webster.