What It Scores
DIABASE is a valid word in the tournament list this site uses. Tile values only, before any premium square: 10 in Scrabble and 11 in Words With Friends. The letters break down as D2 I1 A1 B3 A1 S1 E1.
At seven letters this plays a whole rack, which is a bingo and worth 60 in Scrabble once the 50 point bonus lands.
Words Made From The Letters In DIABASE
104 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.
6 letter words (3)
5 letter words (13)
4 letter words (36)
ABASABEDABIDAIASAIDAAIDEAIDSASEABAASBADEBADSBASEBEADBEDSBIASBIDEBIDSBISEDABSDAESDAISDEBSDESIDIBSDIEBDIESDISAIDEAIDESISBASABESADESADISAIDSIDASIDE
3 letter words (34)
AASABAABSADSAIAAIDAISBAABADBASBEDBESBIDBISDABDAEDASDEBDEIDIBDIEDISEASEDSIDEIDSSABSADSAESAISEASEDSEISIB
2 letter words (18)
Next: the Word Unscrambler for any letters at all. Full entry and definition at Merriam-Webster.