67 entries under expression topic. ×
| de rigueur(adjective, right, essential, required) | |
| called for(verb, phrasal verb, right, essential) | |
| of the essence(adjective, idiom, important, essential) | |
| sine qua non(noun, idiom, need, essential) | |
| rest room(idiom, receptacle) | |
| ask for(verb, phrasal verb, requirement) | |
| in demand(adjective, idiom, basic, main) | |
| incumbent on(adjective, essential, required, obligatory) | |
| clear and distinct | |
| clear as day | |
| holding together(clear, sound, reasonable, sensible) | |
| holding water(clear, sound, reasonable, sensible) | |
| life or death(noun, idiom, need, essential) | |
| mattering much(big, significant, substantial, valuable) | |
| most likely(clear, sound, reasonable, sensible) | |
| name of game(adjective, idiom, essential, required) | |
| no alternative(noun, need, essential, requirement) | |
| no choice(noun, need, essential, requirement) | |
| of moment(big, significant, substantial, valuable) | |
| of note(big, significant, substantial, valuable) |
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| APA | Smart Define. (2015). necessary thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/necessary/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "necessary thesaurus" https://smartdefine.org/necessary/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, necessary thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/necessary/thesaurus/synonyms>. |
| MLA | Smart Define. "necessary thesaurus" 2 November 2015. Web. 20 September 2026. <https://smartdefine.org/necessary/thesaurus/synonyms> |