hard [Adjective] + rock [Noun]

Strength Strength Dispersion
A:
112
CHISQ:
741.65
AWT:
1,909,831
TTEST:
9.34
G2:
287.43
FAWT:
28.46
MI:
3.09
LOGLOG:
21
JD:
0.84
MI3:
16.7
DICE:
0.92
RANGE: