RichThesaurus
longstanding
longstanding
synonyms
chronic
long-standing
everlasting
continual
old
durable
incessant
lasting
undying
perdurable
abiding
deep-rooted
lifelong
eternal
unceasing
perennial
permanent
constant
continuing
established
long-lasting
inherent
persisting
longtime
yearlong
endless
till the cows come home
lodged in one’s brain
persistent
subconscious
sustained
uninterrupted
unchanging
indelible
yearly
deep-seated
seasonal
never-ending
dyed-in-the-wool
indissoluble
recurrent
long-term
unremitting
confirmed
unfailing
inveterate
stable
perpetual
inbred
imperishable
more synonyms
longstanding
antonyms
passing
transient
temporary
shortlived
fleeting
interrupted
ceasing
intermittent
ephemeral
ending
changing