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)
<1234510>
11 years ago|9.6k views|share |citing 
APASmart Define. (2015). brighten thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/brighten/thesaurus/synonyms
ChicagoSmart Define. 2015. "brighten thesaurus" https://smartdefine.org/brighten/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, brighten thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/brighten/thesaurus/synonyms>.
MLASmart Define. "brighten thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/brighten/thesaurus/synonyms>