25 entries under severity topic. ×

11
serious(expression, adjective, earnest, harshness)
8
earnest(noun, expression, adjective, cool, cold)
8
grave(expression, adjective, earnest, harshness)
6
heavy(adjective, earnest, harshness)
6
sophisticated(adjective, sophistication, harshness, grievousness)
5
severe(expression, adjective, hard, harsh)
4
hard(adjective, severe, harsh, stern)
2
weighty(adjective, sophistication, harshness, grievousness)
2
heartrending(adjective, sophistication, harshness, grievousness)
2
burdensome(adjective, sophistication, harshness, grievousness)
2
critical(expression, adjective, earnest, harshness)
2
grievous(adjective, sophistication, harshness, grievousness)
2
rough(adjective, sophistication, harshness, grievousness)
2
solemn(expression, adjective, earnest, harshness)
2
tough(adjective, sophistication, harshness, grievousness)
1
arduous(adjective, sophistication, harshness, grievousness)
1
complicated(adjective, sophistication, harshness, grievousness)
1
difficult(adjective, sophistication, harshness, grievousness)
1
laborious(adjective, sophistication, harshness, grievousness)
1
operose(adjective, sophistication, harshness, grievousness)
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APASmart Define. (2015). unserious thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/unserious/thesaurus/antonyms
ChicagoSmart Define. 2015. "unserious thesaurus" https://smartdefine.org/unserious/thesaurus/antonyms (accessed September 29, 2026).
HarvardSmart Define 2015, unserious thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/unserious/thesaurus/antonyms>.
MLASmart Define. "unserious thesaurus" 10 April 2015. Web. 29 September 2026. <https://smartdefine.org/unserious/thesaurus/antonyms>