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19 entries under familiar topic. ×

3
time-honored(adjective, usual, regular, conventional)
2
inveterate(adjective, set, fixed, established)
2
of long standing(expression, idiom, established)
1
hardened(adjective, set, fixed, established)
1
old(usual, regular, conventional, customary)
0
constant
0
continuing
0
enduring
0
firm
0
lifelong
0
long-lasting
0
long-lived
0
perennial
0
perpetual
0
practiced
0
solid
0
staying
0
steady
0
vintage(customary, established, traditional, habitual)
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APASmart Define. (2015). long-established thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/long-established/thesaurus/synonyms
ChicagoSmart Define. 2015. "long-established thesaurus" https://smartdefine.org/long-established/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, long-established thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/long-established/thesaurus/synonyms>.
MLASmart Define. "long-established thesaurus" 13 April 2015. Web. 25 September 2026. <https://smartdefine.org/long-established/thesaurus/synonyms>