85 entries under broaden topic. ×

37
extend(verb, go, cover, advance, increase)
27
protract(verb, support, take, go, help)
25
lengthen(verb, take, go, cover, advance)
24
stretch(noun, verb, take, cover, increase)
21
continue(verb, support, take, help, cover)
18
draw out(verb, expression, phrasal verb, take, go)
18
elongate(verb, take, go, cover, increase)
14
drag out(verb, expression, phrasal verb, take, go)
13
expand(verb, take, cover, advance, increase)
11
spin out(verb, expression, phrasal verb, take, go)
10
increase(verb, take, cover, open, develop)
9
stretch out(verb, expression, phrasal verb, increase, open)
8
carry on(verb, expression, phrasal verb, take, cover)
7
dilate(verb, take, cover, advance, increase)
7
last(verb, take, cover, advance, increase)
7
prolongate(verb, take, go, cover, increase)
6
enlarge(verb, take, cover, advance, increase)
5
spread(verb, take, cover, advance, increase)
4
draw(verb, take, go, cover, increase)
4
go on(verb, expression, phrasal verb, take, cover)
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APASmart Define. (2016). prolong thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/prolong/thesaurus/synonyms
ChicagoSmart Define. 2016. "prolong thesaurus" https://smartdefine.org/prolong/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, prolong thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/prolong/thesaurus/synonyms>.
MLASmart Define. "prolong thesaurus" 17 February 2016. Web. 23 September 2026. <https://smartdefine.org/prolong/thesaurus/synonyms>