4
proliferation(noun, act, increase, rise, growth)
4
raise(noun, verb, act, advance, increase)
4
revival(noun, increase)
4
spread(noun, verb, advance, increase, open)
4
spurt(increase, rise, growth)
4
upgrade(noun, advance, increase, raise, rise)
3
accretion(noun, advance, increase, raise, gain)
3
accrual(noun, raise, gain, rise, development)
3
addition(noun, advance, increase, raise, rise)
3
amplify(verb, increase, open, develop, extend)
3
arise
3
augmentation(noun, act, advance, increase, raise)
3
billow(noun, verb, advance, increase, raise)
3
buildup(noun, act, increase, rise, swell)
3
elevation
3
enlargement(noun, act, advance, increase, raise)
3
escalate(verb, increase, rise, swell, grow)
3
escalation(noun, act, increase, raise, gain)
3
explosion(noun, surge, outburst, outbreak, outpouring)
3
extension(noun, raise, gain, rise, development)
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APASmart Define. (2015). upsurge thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/upsurge/thesaurus/synonyms
ChicagoSmart Define. 2015. "upsurge thesaurus" https://smartdefine.org/upsurge/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, upsurge thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/upsurge/thesaurus/synonyms>.
MLASmart Define. "upsurge thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/upsurge/thesaurus/synonyms>