hardness scale

14 LETTERS · STARTS WITH H

hardness scale is a valid 14-letter word worth 19 points in Scrabble and 21 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

H4A1R1D2N1E1S1S1S1C3A1L1E1

4 + 1 + 1 + 2 + 1 + 1 + 1 + 1 + 0 + 1 + 3 + 1 + 1 + 1 =19 PTS

DOUBLE WORD → 38TRIPLE WORD → 57

MEANING

What does hardness scale mean?