6
add to(verb, expression, phrasal verb, take, cover)
6
inflate(verb, get, advance, increase, open)
6
exasperate(increase, annoy, provoke, aggravate, impair)
6
fire(verb, stimulate, excite, arouse, stir)
6
rouse(verb, advance, increase, develop, disturb)
6
swell(verb, advance, increase, open, develop)
6
uplift(verb, raise, lift, elevate, elevation)
5
step up(verb, expression, phrasal verb, support, advance)
5
accentuate(verb, increase, raise, severe, boost)
5
add(verb, support, increase, establish, extend)
5
broaden(verb, take, cover, advance, increase)
5
embitter(annoy, provoke, aggravate, impair, worsen)
5
emphasize(verb, increase, raise, severe, strengthen)
5
gather(verb, get, increase, promote, gain)
5
hoist(verb, form, make, raise, create)
5
inflame(verb, decline, disturb, encourage, rise)
5
lengthen(verb, take, cover, advance, increase)
5
maximize(verb, increase)
5
perk up(verb, expression, phrasal verb, get, advance)
5
provoke(verb, decline, disturb, encourage, annoy)
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APASmart Define. (2015). heighten thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/heighten/thesaurus/synonyms
ChicagoSmart Define. 2015. "heighten thesaurus" https://smartdefine.org/heighten/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, heighten thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/heighten/thesaurus/synonyms>.
MLASmart Define. "heighten thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/heighten/thesaurus/synonyms>