- Definitions|2
- Thesaurus|2.2k
- Abbreviations|0
71 entries under expression topic. ×
| sine qua non(noun, idiom, part, need) | |
| rock bottom(noun, part, cause, quick) | |
| fundamental frequency(noun, idiom) | |
| part and parcel(noun, adjective, idiom, characteristic) | |
| bottom line(noun, part, condition, essence) | |
| brass tacks(noun, part, condition, essence) | |
| coal and ice(noun, idiom, part, important) | |
| first harmonic(noun, idiom) | |
| nuts and bolts(idiom, condition, basic, necessity) | |
| article of faith(regulation, rule, belief, statement) | |
| chief ingredient(noun, support, action, base) | |
| de rigueur(adjective, significant, essential, basic) | |
| duck soup(simple, straightforward, basic, uncomplicated) | |
| fire and ice(noun, idiom, condition, essence) | |
| first off(adjective, head, beginning, prime) | |
| hard fact(noun, support, action, base) | |
| in its infancy | |
| in the beginning(adjective, idiom, head, beginning) | |
| in the bud | |
| in the grain(idiom, intrinsicality) |
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| APA | Smart Define. (2016). fundamental thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/fundamental/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "fundamental thesaurus" https://smartdefine.org/fundamental/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, fundamental thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/fundamental/thesaurus/synonyms>. |
| MLA | Smart Define. "fundamental thesaurus" 29 March 2016. Web. 22 September 2026. <https://smartdefine.org/fundamental/thesaurus/synonyms> |