ultralong
hyperextended
long as one's arm
superlong
forever
dragging
far
crow's age
coon's age
light year
years
dolicho-
macro-
age
grip
blue moon
ages
donkey's
overlong
prolongedly
lengthsome
overprotracted
indestructible
lengthways
perdurable
durable
undestroyable
longish
eternity
mecocephalic
until the cows freeze over
until the cows come home
extralong
elongated
inveterately
macrognathic
at length
longways
sesquipedalianism
time out of mind
forever and a day
long
overstride
sesquipedalian
month of Sundays
interminable
eternal
dog's age
prolonged
endless
hot minute
lengthily
protracted
eon
drawn-out
extended
longsome
lifetime
lengthy
country mile
overlength
enduring
imperishable
stretch
period
abiding
long-distance
lengthly
overkeep
overwide
long-span
prolongated
longwise
sesquipedality
aeon
dolichophallic
midlong
for hours
with ages
metastyle
ultrawide
longwhiles
geographically challenged
route-march
long-drawn-out
go all around the Wrekin
long haul
overfar
hippopotomonstrosesquipedalian
donkey's ears
yard-long
donkey's years