20 entries under fast topic. ×

21
smart(adjective, light, dark, stupid, active)
19
intelligent(adjective, mind, behavior, disability, foolishness)
18
active(adjective, smart, fixed, afraid)
17
sharp(adjective, smart, active, cutting)
11
lively(adjective, smart, active, lethargic)
10
keen(adjective, calm, sharp, smart, indifferent)
10
luminous(adjective, smart, bright, active)
9
lustrous(adjective, smart, active, shining)
8
exciting(adjective, smart, active)
8
clear(adjective, smart, bright, dirty, active)
7
vivacious(adjective, smart, lively, active)
6
pointed(verb, adjective, smart, active)
6
quick(adjective, smart, active)
6
light(verb, adjective, obscure, smart, active)
6
sensitive(adjective, smart, active)
5
knifelike(adjective, smart, active, wornout)
3
eventful(adjective, smart, active, significant)
3
witty(adjective, smart, active)
1
serrated(adjective, smart, active)
0
cognizant(adjective, smart, active)
10 years ago|15k views|share |citing 
APASmart Define. (2016). dull thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/dull/thesaurus/antonyms
ChicagoSmart Define. 2016. "dull thesaurus" https://smartdefine.org/dull/thesaurus/antonyms (accessed September 26, 2026).
HarvardSmart Define 2016, dull thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/dull/thesaurus/antonyms>.
MLASmart Define. "dull thesaurus" 29 March 2016. Web. 26 September 2026. <https://smartdefine.org/dull/thesaurus/antonyms>