9
improve(verb, stop, drop, decline, worsen)
9
raise(verb, drop, increase, hurt, destroy)
7
increase(verb, stop, drop, decrease, extend)
7
amplify(verb, increase, effect)
5
enlarge(verb, stop, cut, increase, decrease)
5
aggrandize(verb, keep, reduce, belittle)
5
augment(verb, hurt, reduce, diminish)
5
elevate(verb, drop, promote, fall, lift)
5
enhance(verb, hurt, reduce, neglect)
4
expand(verb, stop, close, increase, extend)
4
extend(verb, take, increase, keep, decrease)
4
heighten(verb, hurt, reduce, lower)
4
intensify(verb, dull, increase, extend, slow)
3
accumulate(verb, separate, gather, amass, disperse)
3
develop(verb, stop, decline, increase, extend)
3
escalate(verb, stop, drop, increase, slow)
3
grow(verb, stop, drop, increase, extend)
3
lengthen(verb, increase, extend, contract, shorten)
3
magnify(verb, reduce, contract, enlarge, shrink)
3
maximize(verb, decrease)
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APASmart Define. (2016). lessen thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/lessen/thesaurus/antonyms
ChicagoSmart Define. 2016. "lessen thesaurus" https://smartdefine.org/lessen/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2016, lessen thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/lessen/thesaurus/antonyms>.
MLASmart Define. "lessen thesaurus" 31 January 2016. Web. 22 September 2026. <https://smartdefine.org/lessen/thesaurus/antonyms>