insensitive
tough
toughened
Philistine
anneal
apathetic
asleep
astorgous
backed
benumbed
brazen
brutalize
calcified
calcify
calloused
case harden
case-hardened
cold
cold of heart
coldblooded
coldhearted
conscienceless
cornify
crusted
crusty
crystallized
dead
deadened
dull
firm
flinthearted
flinty
fossilize
fossilized
granulated
hard
hard of heart
hard-boiled
hard-nosed
harden
hardened
hardhearted
heartless
hornified
impassible
impenitent
imperceptive
impercipient
impervious
indurate
inure
callouses
callousing
careless
cold-blooded
cynical
indifferent
inhuman
insolent
overbear
ruthless
selfish
thoughtless
uncaring
unfeeling
unkind
unsympathetic
vindictive
Alice
Daedalus
Dallas
Palace
Pallas
balas
ballasts
callus
digitalis
gallus
malice
palace
prothallus