45 entries under protracted topic. ×

15
extended(verb, adjective, tedious, long, advanced)
14
expanded(verb, adjective, great, deep, high)
14
prolonged(verb, adjective, great, deep, high)
13
elongated(verb, adjective, great, deep, high)
13
enlarged(verb, adjective, great, deep, high)
11
long(adjective, time, great, deep, high)
10
stretched(verb, adjective, great, deep, high)
7
elongate(adjective, great, deep, high, remote)
5
lengthy(adjective, great, deep, high, remote)
4
drawn-out(adjective, great, high, tedious, long)
3
continued(verb, adjective, great, deep, high)
3
drawn out(verb, expression, adjective, phrasal verb, great)
3
extensive(adjective, great, deep, high, remote)
3
spread(verb, adjective, extended, expanded)
3
stretched out(verb, expression, adjective, phrasal verb, extended)
2
delayed(verb, extended, lingering, prolonged)
2
lasting(adjective, great, deep, high, remote)
2
lingering(adjective, great, deep, high, remote)
2
long-drawn-out(great, high, long, extended)
2
longish(adjective, great, deep, high, remote)
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APASmart Define. (2015). lengthened thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/lengthened/thesaurus/synonyms
ChicagoSmart Define. 2015. "lengthened thesaurus" https://smartdefine.org/lengthened/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, lengthened thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/lengthened/thesaurus/synonyms>.
MLASmart Define. "lengthened thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/lengthened/thesaurus/synonyms>