Father Time
Methuselah
Nestor
Old Paar
centenarian
elder
fogy
fuddy-duddy
gaffer
geezer
golden-ager
gramps
grandfather
grandsire
graybeard
nonagenarian
octogenarian
old chap
old codger
old dog
old duffer
old fart
old fogy
old geezer
old gent
old gentleman
old man
old party
old-timer
older
oldster
pantaloon
patriarch
presbyter
senile
senior citizen
septuagenarian
sexagenarian
the quiet-voiced elders
venerable sir
veteran
golden ager
old person
cotton grass
doughboy
garrulity
huggings
scapegrace
snowball