35 entries under even topic. ×

6
abiding(adjective, continue, steady, hardened)
5
perdurable(adjective, continue, steady, unchanging)
3
immutable(steady, unchanging)
2
tough(steady, unchanging)
1
deep-rooted(complete, true, steady, fixed)
1
secure(steady, unchanging)
1
set(adjective, steady, hardened, unchanging)
1
staunch(steady, unchanging)
1
unchangeable(steady, unchanging)
1
unchanging
1
unwavering(steady, unchanging)
1
well-founded(adjective, steady, unchanging)
0
anchored(steady, unchanging)
0
balanced(steady, unchanging)
0
brick-wall(steady, unchanging)
0
calm(steady, unchanging)
0
committed(steady, unchanging)
0
equable(steady, unchanging)
0
fixed resistant(expression, steady, unchanging)
0
nailed(steady, unchanging)
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APASmart Define. (2015). long-standing thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/long-standing/thesaurus/synonyms
ChicagoSmart Define. 2015. "long-standing thesaurus" https://smartdefine.org/long-standing/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, long-standing thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/long-standing/thesaurus/synonyms>.
MLASmart Define. "long-standing thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/long-standing/thesaurus/synonyms>