bloody
internal
baneful
brutal
calamitous
cataclysmal
cataclysmic
catastrophic
consuming
consumptive
deadly
death-bringing
deathful
deathly
demolishing
demolitionary
depredatory
desolating
destroying
destructive
devastating
disastrous
doomful
fatal
fateful
feral
fratricidal
intramural
killing
lethal
malign
malignant
mortal
nihilist
nihilistic
pernicious
ravaging
ruining
ruinous
savage
self-destructive
subversionary
subversive
suicidal
vandalic
vandalish
vandalistic
virulent
wasteful
wasting
withering
age-old
arab-israeli
bicoastal
dynastic
factional
generational
guerilla
hand-to-hand
inter-tribal
interdepartmental
interservice
jurisdictional
life-and-death
long-running
long-standing
low-intensity
rancorous
sanguinary
sectarian
sectional
unending
wordy