hardness

(noun) consistency (generic term)
(noun) quality (generic term)
(noun) unfeelingness
(noun) ruggedness
(noun) severity
(adj) difficult
(adj) calculating (similar term)
(adj) adamantine (similar term)
(adj) knockout
(adj) arduous
(adj) unvoiced
(adj) concentrated
(adj) velar (similar term)
(adj) intemperate
(adj) strong
(adj) tough
(adj) stale (similar term)
(adv) firmly
(adv) severely
(adv) hardly
(adv) heavily

< hardly a | hardpan >