lasting
permanent
ageless
amaranthine
articulated
catenated
ceaseless
coeternal
concatenated
connected
constant
continual
continued
continuing
continuous
cyclical
dateless
direct
endless
eternal
eterne
ever-being
ever-durable
ever-during
everlasting
everliving
featureless
gapless
immediate
immemorial
immortal
incessant
indestructible
infinite
interminable
joined
jointless
linked
monotonous
never-ceasing
never-ending
nonstop
nonterminating
nonterminous
olamic
perdurable
perennial
periodic
perpetual
recurrent
end
ending
unendingly
unendingness
boundless
frightful
lifelong
relentless
unceasing
uninterrupted
unspeakable
untold
amending
apprehending
ascending
attending
befriending
bending
blending
commending
comprehending
condescending
contending
defending
depending
descending
expending
extending
fending
impending
intending
lending
mending
misspending
offending
overextending
pending
portending
pretending
recommending
rending
sending
spending
suspending
tending
transcending
trending
unbending
vending
wending