stiffening; rigidity; rigor; stiffness; ossification; petrification
hardening; vulcanization; hardening (of attitude, stance, etc.); stiffening; upturn (in the market); firming up
firm; strong; unbending; unyielding; uncompromising; stubborn
hard-liners; diehards; hawks
tough measure; firm step; strong measure
hard-liners; diehards; (young) man with traditionally masculine interests; tough boy; hard news; reporter who covers political and economic affairs
hard ball; regulation ball
cemented carbide; superhard; ultrahard
hard-line policy; tough measure
hardness and softness; hard line and moderate line
crude; immature; unpolished
arteriosclerosis; hardening of the arteries; loss of flexibility (in thinking, systems, etc.); inflexibility; institutional rigidity
hard (esp. of hardball, tennis, etc.)
bone; firmness (of character); backbone; unyielding spirit
hard glass; hardened glass
subdural hematoma; subdural hemorrhage; subdural haemorrhage
hardener; curative agent; stiffening agent
hard rubber (e.g. ebonite, vulcanite)
amyotrophic lateral sclerosis; ALS; Lou Gehrig's disease
(regulation-ball) tennis (as opposed to soft tennis)
man of principle; man of firm character; man of steadfast beliefs
epidural hematoma; epidural haematoma
regulation baseball (as opposed to the variety played with a rubber ball)
arteriosclerosis; hardening of the arteries
epidural anaesthesia; epidural anesthesia
hard line; hard-line; tough line; hawkish line
bony fishes; osteichthyans
plaster (type of bandage)
hydrogenated oil; hardened oil
train ticket printed on thick paper
primary biliary cirrhosis
organizational inertia; organisational inertia
cranial dura mater; cerebral dura mater
epidural haemorrhage; epidural hemorrhage; epidural bleeding
arteriosclerosis obliterans
heavy and hard (of a wood)
forced march; (fig.) doing something on a very strict schedule
cerebral infarction; (ischemic) stroke
stoppage; blocking; infarction; infarct
age hardening; precipitation hardening; particle hardening
thermosetting material (esp. plastics and resins)
subacute sclerosing panencephalitis; SSPE
scirrhous carcinoma; scirrhus
primary lateral sclerosis; PLS
thermosetting resin; thermosetting polymer
sclerophyll forest; sclerophyllous forest; hardwood forest
high-contrast (photography); hard tone; bullish (market); firm
atherosclerosis; atherosclerotic
hardener (catalyst in hardening thermosetting materials)
stalwart and insurgent factions
bony fishes; Osteichthyes
Osteichthyes (class comprising the bony fishes and sometimes their descendants, i.e. tetrapods)