adj. hard coal
between the rock and the hard place
die hard
hard and fast
hard ass
hard assed
hard bitten
hard boil
hard boiled
hard candy
hard case
hard cheese
hard cider
hard clam
hard coated
hard copy
hard core
hard disk
hard drive
hard driving
hard edge
hard edged
hard eyed
hard goods
hard hat
hard hearted
hard heartedness
hard heartedly
hard hit
hard hitting
hard knocks
hard labor
hard line
hard liner
hard lines
hard luck
hard maple
hard nosed
hard of hearing
hard on
hard ons
hard palate
hard paste porcelain
hard pine
hard pressed
hard put
hard rock
hard rubber
hard sauce
hard sell
hard set
hard shell
hard shelled
hard shell clam
hard shelled clam
hard shell crab
hard shelled crab
hard stone
hard times token
hard up
hard wheat
hard won
between a rock and a hard place
very hard