87 entries under expression topic. ×
| no joke(adjective, idiom, dullness, weighty) | |
| no laughing matter(adjective, idiom, weighty, aper) | |
| bound and determined(adjective, idiom, serious, somber) | |
| of consequence(adjective, weighty, aper, demoniac) | |
| at ease(adjective, calm, relaxed, tranquil) | |
| bent on(adjective, firm, resolute, persistent) | |
| bona fide(adjective, open, honest, total) | |
| buckled down(adjective, resolute, persistent, unwavering) | |
| by the book(adjective, idiom, strong, hard) | |
| cold sober(adjective, calm, set, cool) | |
| cool as cucumber(adjective, idiom, calm, cool) | |
| dying to(adjective, keen, warm, intense) | |
| fraught with danger | |
| gotta have(adjective, keen, intense, passionate) | |
| gung ho(adjective, keen, intense, passionate) | |
| honest to God(honest, true, straightforward, earnest) | |
| hopped up(adjective, keen, intense, passionate) | |
| hot for(adjective, keen, intense, passionate) | |
| keeping a stiff upper lip(adjective, idiom, calm, relaxed) | |
| life and death(idiom, great, heavy, important) |
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| APA | Smart Define. (2016). serious thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/serious/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "serious thesaurus" https://smartdefine.org/serious/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, serious thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/serious/thesaurus/synonyms>. |
| MLA | Smart Define. "serious thesaurus" 24 February 2016. Web. 20 September 2026. <https://smartdefine.org/serious/thesaurus/synonyms> |