72 entries under adjective topic. ×

61
persistent(continue, strain, firmness, labour)
39
stable(strain, firmness, labour, hardiness)
38
strong(strain, firmness, labour, hardiness)
37
firm(strain, firmness, labour, hardiness)
36
consistent(strain, firmness, labour, hardiness)
36
sound(strain, firmness, labour, hardiness)
36
unfluctuating(strain, firmness, labour, hardiness)
27
lasting(continue, strain, firmness, labour)
26
enduring(continue, strain, firmness, labour)
24
durable(continue, strain, firmness, labour)
24
permanent(continue, strain, firmness, labour)
23
steady(strain, firmness, labour, hardiness)
22
steadfast(strain, firmness, labour, hardiness)
21
constant(strain, firmness, labour, hardiness)
19
invariable(strain, firmness, labour, hardiness)
19
lingering(strain, firmness, labour, hardiness)
19
perpetual(strain, firmness, labour, hardiness)
19
settled(strain, firmness, labour, hardiness)
19
staying(strain, firmness, labour, hardiness)
19
unalterable(strain, firmness, labour, hardiness)
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APASmart Define. (2015). long-standing thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/long-standing/thesaurus/synonyms
ChicagoSmart Define. 2015. "long-standing thesaurus" https://smartdefine.org/long-standing/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, long-standing thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/long-standing/thesaurus/synonyms>.
MLASmart Define. "long-standing thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/long-standing/thesaurus/synonyms>