animality
atrociousness
barbarity
barbarousness
beastliness
bestiality
bloodiness
bloodlust
bloodthirst
bloodthirstiness
bloody-mindedness
brutality
brutalness
brutishness
cannibalism
cruelness
cruelty
ferociousness
ferocity
fiendishness
fierceness
flintiness
hardness
harshness
heartlessness
inclemency
inexorableness
inhumaneness
inhumanity
mercilessness
pitilessness
relentlessness
remorselessness
sadism
sadistic cruelty
sanguineousness
savagery
short shrift
tender mercies
truculence
uncompassionateness
unfeelingness
unforgivingness
unmercifulness
unremorsefulness
unsympatheticness
unyieldingness
vandalism
viciousness
cold-heartedness
hardheartedness
aggressiveness
arrogance
audacity
callousness
desperation
disloyalty
fearlessness
haughtiness
insensibility
lawlessness
perfidy
recklessness
savageness
selfishness
stubbornness
unselfishness