46 entries under protracted topic. ×

63
persistent(adjective, strain, firmness, constant, continuous)
23
lasting(adjective, great, strain, deep, high)
21
enduring(adjective, great, strain, deep, high)
18
lingering(adjective, great, strain, slow, deep)
10
continued(verb, adjective, great, spread, deep)
7
long(adjective, time, great, deep, boring)
7
prolonged(verb, adjective, great, slow, deep)
5
extended(verb, adjective, spread, advanced, extensive)
3
running(adjective, great, deep, high, remote)
1
dilatory(slow, boring, tedious, late, rambling)
1
drawn out(expression, adjective, great, deep, high)
1
elongate(adjective, great, deep, high, remote)
1
elongated(adjective, great, deep, high, remote)
1
enlarged(adjective, great, deep, high, remote)
1
expanded(adjective, great, deep, high, remote)
1
extensive(adjective, great, deep, high, remote)
1
far-reaching(adjective, great, deep, high, remote)
1
gangling(adjective, great, deep, high, remote)
1
great(adjective, deep, high, remote, long)
1
high(adjective, great, deep, remote, long)
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APASmart Define. (2015). sustained thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/sustained/thesaurus/synonyms
ChicagoSmart Define. 2015. "sustained thesaurus" https://smartdefine.org/sustained/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, sustained thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/sustained/thesaurus/synonyms>.
MLASmart Define. "sustained thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/sustained/thesaurus/synonyms>