Big Brother
Father Time
Methuselah
Nestor
Old Paar
auditor
boatswain
boss
centenarian
chief
comptroller
controller
dotard
duffer
elder
floor manager
floorman
floorwalker
foreman
ganger
geezer
golden-ager
gramps
grandfather
grandsire
graybeard
head
headman
inspector
monitor
nonagenarian
noncommissioned officer
octogenarian
old boy
old chap
old codger
old dog
old duffer
old geezer
old gent
old gentleman
old man
old party
old-timer
older
oldster
overman
overseer
pantaloon
electrician
greybeard
lineman
linesman
gaffer tape
gammer
beldame
chess-player
crone
ey'n
fanzine
frith
here-at
ive
langer
micht
minut
nigher
oldsters
pressin
revealment
saut
storthing
troyer
wey
whatsomever
woman-hater
wumman