1
earnest
1
grave
1
humorless
1
no-nonsense
1
sedate
1
serious
1
severe
1
sober
1
sobersided
1
solemn
1
staid
1
uncomic
1
unsmiling
1
weighty
0
affecting
0
dull
0
humourless
0
lachrymose
0
lame
0
mournful
<12>
13 years ago|286 views|share |citing 
APASmart Define. (2013). sidesplitting thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/sidesplitting/thesaurus/antonyms
ChicagoSmart Define. 2013. "sidesplitting thesaurus" https://smartdefine.org/sidesplitting/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2013, sidesplitting thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/sidesplitting/thesaurus/antonyms>.
MLASmart Define. "sidesplitting thesaurus" 28 June 2013. Web. 22 September 2026. <https://smartdefine.org/sidesplitting/thesaurus/antonyms>