- Definitions|0
- Thesaurus|588
- Abbreviations|0
53 entries under adjective topic. ×
| rough(severity, sophistication, harshness, grievousness) | |
| solemn(expression, severity, earnest, harshness) | |
| stern(hard, severe, harsh) | |
| tough(severity, sophistication, harshness, grievousness) | |
| sincere(false, sober, disciplined, insincere) | |
| arduous(severity, sophistication, harshness, grievousness) | |
| complicated(severity, sophistication, harshness, grievousness) | |
| difficult(severity, sophistication, harshness, grievousness) | |
| hardboiled(upset, light, sober, disciplined) | |
| harsh(hard, severe, stern) | |
| involved(importance, significance, consequence, eminence) | |
| laborious(severity, sophistication, harshness, grievousness) | |
| momentous(importance, significance, consequence, eminence) | |
| operose(severity, sophistication, harshness, grievousness) | |
| somber(light, bright, sober, disciplined) | |
| strict(hard, severe, harsh, stern) | |
| unexcited(light, happy, sober, disciplined) | |
| grim(severity, sophistication, harshness, grievousness) | |
| heavyweight(severity, sophistication, harshness, grievousness) | |
| oppressive(severity, sophistication, harshness, grievousness) |
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| APA | Smart Define. (2015). unserious thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/unserious/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "unserious thesaurus" https://smartdefine.org/unserious/thesaurus/antonyms (accessed September 30, 2026). |
| Harvard | Smart Define 2015, unserious thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/unserious/thesaurus/antonyms>. |
| MLA | Smart Define. "unserious thesaurus" 10 April 2015. Web. 30 September 2026. <https://smartdefine.org/unserious/thesaurus/antonyms> |