95 entries under boost topic. ×

1
prolong(verb, advance, increase, raise, rise)
1
protract(verb, advance, increase, raise, rise)
1
pullulate(verb, advance, increase, raise, rise)
1
pyramid(verb, increase, develop, improve)
1
set off(verb, expression, increase, raise, severe)
1
severe(verb, increase, raise, aggravate)
1
spread(verb, advance, increase, raise, rise)
1
swarm(verb, advance, increase, raise, rise)
1
teem(verb, advance, increase, raise, rise)
1
thicken(verb, advance, increase, raise, rise)
1
tone up(verb, expression, support, increase, raise)
1
upgrade(support, break, advance, raise, improve)
1
wax(verb, support, advance, increase, raise)
1
widen(verb, advance, increase, raise, rise)
0
compound(verb, swell, enlarge, add)
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APASmart Define. (2016). step up thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/step_up/thesaurus/synonyms
ChicagoSmart Define. 2016. "step up thesaurus" https://smartdefine.org/step_up/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, step up thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/step_up/thesaurus/synonyms>.
MLASmart Define. "step up thesaurus" 25 February 2016. Web. 21 September 2026. <https://smartdefine.org/step_up/thesaurus/synonyms>