| mold | |
| basic(noun, condition, want, essential, essence) | |
| be necessary(verb, expression, idiom, need, require) | |
| be obliged to(verb, expression, idiom, phrasal verb, want) | |
| binding(adjective, required) | |
| committal(noun, work, charge, understanding, right) | |
| consideration | |
| desideratum(noun, cause, right, want, need) | |
| dry rot(expression, idiom, uncleanness) | |
| fundamental(noun, condition, need, essential, certainty) | |
| fustiness | |
| mandatory(adjective, required) | |
| mildew(noun, uncleanness, fungus) | |
| mould | |
| musty(adjective, impurity) | |
| obsession(noun, passion, desire, thing, need) | |
| onus(noun, work, charge, understanding, right) | |
| owe | |
| postulate(condition, essential, requirement, qualification, prerequisite) | |
| provision(noun, condition) |
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| APA | Smart Define. (2016). must thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/must/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "must thesaurus" https://smartdefine.org/must/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, must thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/must/thesaurus/synonyms>. |
| MLA | Smart Define. "must thesaurus" 29 January 2016. Web. 23 September 2026. <https://smartdefine.org/must/thesaurus/synonyms> |