Synonyms|198Antonyms|1|Broader|0Narrower|0Related|20

21 entries under hardened topic. ×

7
long-lived(adjective, continue, persistent, lasting)
6
abiding(adjective, continue, steady, even)
6
continuing(adjective, continue, persistent, continuous)
5
chronic(adjective, persistent, continuous, lasting)
5
fixed(adjective, complete, true, persistent, customary)
4
inveterate(adjective, persistent, continuous, lasting)
4
perennial(adjective, continue, persistent, continuous)
3
old(adjective, continue, customary, traditional)
3
persisting(adjective, persistent, continuous, lasting)
1
confirmed(complete, true, fixed, persistent)
1
deep-rooted(complete, true, steady, fixed, even)
1
deep-seated(complete, true, fixed, persistent)
1
habitual(persistent, customary, traditional, lasting)
1
inbred(persistent, continuous, lasting, continuing)
1
incurable(persistent, continuous, lasting, continuing)
1
ineradicable(persistent, continuous, lasting, continuing)
1
ingrained(complete, true, fixed, persistent)
1
lifelong(adjective, persistent, continuous, lasting)
1
obstinate(persistent, continuous, lasting, continuing)
1
set(adjective, steady, even, unchanging)
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APASmart Define. (2015). long-standing thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/long-standing/thesaurus/synonyms
ChicagoSmart Define. 2015. "long-standing thesaurus" https://smartdefine.org/long-standing/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, long-standing thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/long-standing/thesaurus/synonyms>.
MLASmart Define. "long-standing thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/long-standing/thesaurus/synonyms>