硬

firm

hard-liners

stiffening

coin

cirrhosis (of the liver)

arteriosclerosis

hard (esp. of hardball, tennis, etc.)

firmness

hardening

hardness and softness

hard

sclerotic

vulcanite

pen or pencil

hard water

hard-liners

(regulation-ball) tennis (as opposed to soft tennis)

hardwood

Mohs' hardness

Rockwell hardness

muscardine

hardness

hardness

hard-line policy

hard soap

age hardening

cirrhosis

rigor mortis

hard line

tough measure

hydrogenated oil

regulation baseball (as opposed to the variety played with a rubber ball)

induration

heavy and hard (of a wood)

high-contrast (photography)

hard ball

hard cover (of a book)

cemented carbide

crude

thermosetting

rigid constitution

hardwood

price rigidity

thermosetting material (esp. plastics and resins)

permanent hard water

train ticket printed on thick paper

fortis

commemorative coin

sclerosis

muscle stiffness

jadeite

hard line

hard rubber (e.g. ebonite, vulcanite)

scleroprotein

hard glass

organizational inertia

cemented carbide

hardener

downward price rigidity

stalwart and insurgent factions

bone

rigid airship

multiple sclerosis

extremely hard

systemic sclerosis

hardness

dried ramen

Mohs' hardness

scratch hardness

Rockwell hardness

Japan Atherosclerosis Society

sclerophyllous tree

hardener (catalyst in hardening thermosetting materials)

sclerophyll forest

hardpan

hard wheat

terminal hair

arteriosclerosis

hardpan

atherosclerosis

epidural haemorrhage

bony fishes

epidural block

subdural hemorrhage

atherosclerosis

primary lateral sclerosis

bony fish

hard steel

ironstone china

thermosetting resin

cranial dura mater

palatal

man of principle

scirrhous carcinoma

bony fishes

hard palate

Internet tough guy

arteriosclerosis obliterans

subacute sclerosing panencephalitis

Osteichthyes (class comprising the bony fishes and sometimes their descendants, i.e. tetrapods)

anhydrite

dura

primary biliary cirrhosis

epidural anaesthesia

amyotrophic lateral sclerosis

epidural hematoma

subdural hematoma

hardness

plaster (type of bandage)

hard solder

ganoid scale

spinal dura mater