- Definitions|0
- Thesaurus|22
- Abbreviations|0
10 entries under expression topic. ×
| have to(verb, must, should, requires) | |
| is becoming(verb, must, should, requires) | |
| is fitting(verb, must, should, requires) | |
| is logical(verb, must, should, requires) | |
| is natural(verb, must, should, requires) | |
| is reasonable(verb, must, should, requires) | |
| is responsible for(verb, idiom, must, should) | |
| ought to(verb, must, should) | |
| had better(must, should) | |
| have a duty to(idiom, must, should) |
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| APA | Smart Define. (2013). is necessary thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/is_necessary/thesaurus/synonyms |
| Chicago | Smart Define. 2013. "is necessary thesaurus" https://smartdefine.org/is_necessary/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2013, is necessary thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/is_necessary/thesaurus/synonyms>. |
| MLA | Smart Define. "is necessary thesaurus" 18 May 2013. Web. 23 September 2026. <https://smartdefine.org/is_necessary/thesaurus/synonyms> |