18
long-standing(adjective, strain, firmness, labour, hardiness)
18
settled(adjective, strain, firmness, labour, hardiness)
18
stabile(adjective, strain, firmness, persistent, continuous)
18
unalterable(adjective, strain, firmness, persistent, continuous)
13
supported(verb, adjective, constant, established, defended)
11
maintained(verb, adjective, constant, safe, received)
10
continued(verb, adjective, great, spread, deep)
10
continuous(adjective, persistent, constant, unyielding, endless)
10
uninterrupted(adjective, persistent, constant, continuous, endless)
7
long(adjective, time, great, deep, boring)
7
prolonged(verb, adjective, great, slow, deep)
7
unceasing(adjective, persistent, constant, continuous, endless)
7
upheld(verb, adjective, supported, defended, assisted)
6
continual(adjective, persistent, constant, continuous, endless)
6
held
5
abetted(verb, aided, assisted)
5
backed(verb, adjective, constant, promoted, continued)
5
ceaseless(adjective, persistent, constant, continuous, endless)
5
extended(verb, adjective, spread, advanced, extensive)
5
interminable(adjective, slow, persistent, late, continuous)
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APASmart Define. (2015). sustained thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/sustained/thesaurus/synonyms
ChicagoSmart Define. 2015. "sustained thesaurus" https://smartdefine.org/sustained/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, sustained thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/sustained/thesaurus/synonyms>.
MLASmart Define. "sustained thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/sustained/thesaurus/synonyms>