unexhausted
abiding
age-long
aged
ancient
antique
as a bonus
balance
behind
changeless
chronic
commorant
constant
continuing
continuous
diuturnal
durable
dwelling
enduring
evergreen
extant
extra
firm
fixed
for lagniappe
frozen
hardy
immobile
immutable
in residence
indefatigable
intact
intransient
inveterate
inviolate
lasting
left
leftover
living
living in
lodging
long-lasting
long-lived
long-standing
long-term
longeval
longevous
macrobiotic
net
odd
abstaining
ascertaining
attaining
campaigning
caning
chaining
complaining
constraining
containing
deigning
detaining
disdaining
draining
entertaining
explaining
feigning
gaining
maintaining
obtaining
ordaining
overtraining
painting
pertaining
raining
refraining
regaining
reigning
reining
restraining
retaining
retraining
staining
straining
sustaining
training
waning