98 entries under broaden topic. ×

28
extend(verb, go, set, cover, advance)
26
stretch(noun, verb, take, set, cover)
21
expand(verb, take, set, cover, advance)
21
prolong(verb, take, go, cover, advance)
20
elongate(verb, take, go, cover, increase)
19
draw out(verb, expression, phrasal verb, take, go)
17
enlarge(verb, take, set, cover, advance)
17
protract(verb, take, go, cover, advance)
16
increase(noun, verb, take, set, cover)
15
augment(verb, take, cover, advance, increase)
13
amplify(verb, take, cover, advance, increase)
13
dilate(verb, take, set, cover, advance)
13
distend(verb, go, cover, advance, increase)
12
continue(verb, take, cover, advance, increase)
12
inflate(verb, go, cover, advance, increase)
10
draw(verb, take, go, cover, increase)
10
grow(verb, cover, increase, open, develop)
10
spin out(verb, expression, phrasal verb, take, go)
10
swell(verb, go, set, cover, advance)
10
widen(verb, take, go, set, cover)
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APASmart Define. (2016). lengthen thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/lengthen/thesaurus/synonyms
ChicagoSmart Define. 2016. "lengthen thesaurus" https://smartdefine.org/lengthen/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, lengthen thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/lengthen/thesaurus/synonyms>.
MLASmart Define. "lengthen thesaurus" 9 March 2016. Web. 27 September 2026. <https://smartdefine.org/lengthen/thesaurus/synonyms>