Synonyms|75Antonyms|0|Broader|0Narrower|0Related|6
4
time-consuming
2
aged
2
constant(familiar, established, long-established)
2
continuing(familiar, established, long-established)
2
enduring(familiar, established, long-established)
2
inveterate(familiar, established, long-established)
2
long-established(familiar, established)
2
long-lasting(familiar, established, long-established)
2
long-lived(familiar, established, long-established)
2
perennial(familiar, established, long-established)
2
perpetual(familiar, established, long-established)
2
time-honored(familiar, established, long-established)
1
abiding
1
acknowledged
1
admitted
1
ancient
1
antique
1
chronic
1
conventional
1
customary
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APASmart Define. (2015). of long standing thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/of_long_standing/thesaurus/synonyms
ChicagoSmart Define. 2015. "of long standing thesaurus" https://smartdefine.org/of_long_standing/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, of long standing thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/of_long_standing/thesaurus/synonyms>.
MLASmart Define. "of long standing thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/of_long_standing/thesaurus/synonyms>