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
<1234510>
10 years ago|15k views|share |citing 
APASmart Define. (2016). dull thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/dull/thesaurus/antonyms
ChicagoSmart Define. 2016. "dull thesaurus" https://smartdefine.org/dull/thesaurus/antonyms (accessed September 24, 2026).
HarvardSmart Define 2016, dull thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/dull/thesaurus/antonyms>.
MLASmart Define. "dull thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/dull/thesaurus/antonyms>