32 entries under adjective topic. ×

5
serious(weighty, aper, demoniac, crucial)
2
cooling
2
grave(tough, severe, deep, meaningful)
2
sedating
2
sober
1
deep(tough, severe, difficult, important)
1
far-reaching(tough, severe, important, significant)
1
fateful(tough, severe, important, significant)
1
formidable(tough, severe, important, significant)
1
hard(tough, severe, important, significant)
1
laborious(tough, severe, important, significant)
1
meaning business(expression, tough, severe, important)
1
meaningful(tough, severe, important, significant)
1
no joke(expression, tough, severe, important)
1
no laughing matter(expression, idiom, tough, severe)
1
of consequence(expression, tough, severe, important)
1
operose(tough, severe, important, significant)
1
out for blood(expression, idiom, tough, severe)
1
playing hard ball(expression, idiom, tough, severe)
1
smoking(tough, severe, important, significant)
<12>
13 years ago|1.5k views|share |citing 
APASmart Define. (2013). sobering thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/sobering/thesaurus/synonyms
ChicagoSmart Define. 2013. "sobering thesaurus" https://smartdefine.org/sobering/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2013, sobering thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/sobering/thesaurus/synonyms>.
MLASmart Define. "sobering thesaurus" 28 June 2013. Web. 21 September 2026. <https://smartdefine.org/sobering/thesaurus/synonyms>