abiding
aeonian
ageless
enduring
eonian
eternal
everlasting
imperishable
indissoluble
long
perpetual
stable
standing
unceasing
unending
adamantine
age-long
aged
alive
ancient
antique
assiduous
bulky
cartilaginous
changeless
chewy
chronic
chronological
cohesive
constant
continual
continuance
continuing
continuous
coriaceous
dense
diligent
diuturnal
dogged
drawn-out
durable
durational
durative
eidetic
endless
endurable
endurance
evergreen
extended
faithful
fibrous
firm
fixed
blasting
casting
contrasting
fasting
outlasting
recasting
ephemeral
passing
temporary