RichThesaurus
longevously
longevously
synonyms
enduringly
lastingly
protractedly
at length
prolongedly
abidingly
lengthily
duratively
longsomely
perpetual
permanent
long-lasting
lasting
perennial
forever
dateless
enduring
everlasting
persistent
eternal
timeless
imperishable
ageless
undying
constant
indefinite
unceasing
abiding
continual
round-the-clock
amaranthine
unbroken
ever
endless
unending
set in stone
relentless
invariable
stable
thick
steadfast
long haul
manifold
unchanging
longevously
antonyms
temporarily
forever