Synonyms|514Antonyms|138|Broader|7Narrower|13Related|1k
10
very upset
5
serious
5
sarcastic
3
unplayful
2
sober
2
grim
2
staid
2
stern
1
solemn
1
austere
1
deep
1
dense
1
earnest
1
grave
1
humorless
1
lethargic
1
no-nonsense
1
sedate
1
severe
1
sobersided
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APASmart Define. (2015). playful thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/playful/thesaurus/antonyms
ChicagoSmart Define. 2015. "playful thesaurus" https://smartdefine.org/playful/thesaurus/antonyms (accessed September 25, 2026).
HarvardSmart Define 2015, playful thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/playful/thesaurus/antonyms>.
MLASmart Define. "playful thesaurus" 13 April 2015. Web. 25 September 2026. <https://smartdefine.org/playful/thesaurus/antonyms>