24 entries under adjective topic. ×

8
serious(somber, humorless)
8
earnest(cool, cold, important, enthusiastic)
5
respectful
4
courteous
3
reverent
2
sober(upset, light, frivolous)
1
solemn
1
goofy
1
severe
1
weighty
0
austere
0
big
0
critical
0
dangerous
0
deep
0
devout
0
great
0
grievous
0
grim
0
hard
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APASmart Define. (2015). flippant thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/flippant/thesaurus/antonyms
ChicagoSmart Define. 2015. "flippant thesaurus" https://smartdefine.org/flippant/thesaurus/antonyms (accessed September 26, 2026).
HarvardSmart Define 2015, flippant thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/flippant/thesaurus/antonyms>.
MLASmart Define. "flippant thesaurus" 13 April 2015. Web. 26 September 2026. <https://smartdefine.org/flippant/thesaurus/antonyms>