continuous
insistent
perennial
persistent
recurrent
recurring
relentless
repeated
repetitive
revenant
running
uninterrupted
unrelenting
abiding
ageless
articulated
catenated
ceaseless
chattering
coeternal
concatenated
connected
constant
continued
continuing
cyclical
dateless
direct
endless
eternal
eterne
ever-being
ever-durable
ever-during
everlasting
everliving
featureless
gapless
immediate
immemorial
incessant
indestructible
infinite
interminable
joined
jointless
lasting
linked
machine gun
monotonous
never-ceasing
never-ending
nonstop
nonterminating
nonterminous
olamic
oscillating
perdurable
continuance
continuation
continue
continuum
daily
momentary
sudden