23
lighten(verb, clear, increase, open, reduce)
17
cheer(verb, encourage, raise, delight, stimulate)
17
enliven(verb, encourage, raise, stimulate, excite)
15
shine(verb, light, clean, restore, color)
14
illuminate(verb, light, shine, glow, trim)
13
gladden(verb, encourage, delight, stimulate, excite)
13
light up(verb, expression, phrasal verb, light, flash)
12
burnish(verb, clean, restore, shine, glow)
12
cheer up(verb, expression, phrasal verb, encourage, raise)
12
polish(verb, adjective, development, growth, shine)
11
hearten(verb, encourage, delight, stimulate, excite)
11
light(verb, adjective, happy, flash, color)
10
perk up(verb, expression, phrasal verb, encourage, raise)
9
clear(verb, adjective, clear, release, free)
8
clear up(verb, expression, phrasal verb, happy, improve)
8
encourage(verb, stimulate, excite, happy, improve)
8
glow(noun, verb, light, color, burn)
8
illumine(verb, light, flash, shine, glow)
7
animate(verb, encourage, raise, stimulate, excite)
7
elate(verb, encourage, raise, delight, excite)
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APASmart Define. (2015). brighten thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/brighten/thesaurus/synonyms
ChicagoSmart Define. 2015. "brighten thesaurus" https://smartdefine.org/brighten/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, brighten thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/brighten/thesaurus/synonyms>.
MLASmart Define. "brighten thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/brighten/thesaurus/synonyms>