old
aged
anile
childish
childlike
crabbed
debilitated
decrepit
dilapidated
doddered
doddery
doited
doting
faltering
feeble
fossilized
frail
gerontal
gerontic
groggy
infirm
mossbacked
moth-eaten
mummylike
palsied
papery-skinned
quaking
quavering
quivering
ramshackle
ravaged with age
reeling
ricketish
rickety
rocky
run to seed
rusty
senile
shaking
shaky
shriveled
spidery
spindly
staggering
stricken in years
superannuated
teetering
teetery
soldering