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19 entries under familiar topic. ×

2
constant(established, long-established)
2
continuing(established, long-established)
2
enduring(established, long-established)
2
inveterate(established, long-established)
2
long-established
2
long-lasting(established, long-established)
2
long-lived(established, long-established)
2
perennial(established, long-established)
2
perpetual(established, long-established)
2
time-honored(established, long-established)
1
old(adjective, established, traditional, unremitting)
0
firm(established, long-established)
0
hardened(established, long-established)
0
lifelong(established, long-established)
0
practiced(established, long-established)
0
solid(established, long-established)
0
staying(established, unremitting, long-established, oft-repeated)
0
steady(established, long-established)
0
vintage(established, long-established)
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APASmart Define. (2015). of long standing thesaurus. Retrieved September 23, 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 23, 2026).
HarvardSmart Define 2015, of long standing thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/of_long_standing/thesaurus/synonyms>.
MLASmart Define. "of long standing thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/of_long_standing/thesaurus/synonyms>