21
smart(adjective, light, dark, stupid, active)
20
flirty
19
intelligent(adjective, mind, behavior, disability, foolishness)
18
active(adjective, smart, fast, fixed, afraid)
17
sharp(adjective, smart, active, fast, cutting)
16
romantic
14
awesome(adjective, bad, not cool)
12
interesting(adjective, ordinary, familiar)
11
lively(adjective, smart, active, fast, lethargic)
11
sleek(adjective, smooth, glossy)
10
keen(adjective, calm, sharp, smart, indifferent)
10
luminous(adjective, smart, bright, active, fast)
9
lustrous(adjective, smart, active, fast, shining)
9
ardent
8
bright(adjective, appearance, intelligent, dim, cloudy)
8
exciting(adjective, smart, active, fast)
8
clear(adjective, smart, bright, dirty, active)
8
flabbergast
8
delicious(adjective, trait, attitude, displeasure, tasteless)
8
thought-provoking
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APASmart Define. (2016). dull thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/dull/thesaurus/antonyms
ChicagoSmart Define. 2016. "dull thesaurus" https://smartdefine.org/dull/thesaurus/antonyms (accessed September 25, 2026).
HarvardSmart Define 2016, dull thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/dull/thesaurus/antonyms>.
MLASmart Define. "dull thesaurus" 29 March 2016. Web. 25 September 2026. <https://smartdefine.org/dull/thesaurus/antonyms>