| readying | |
| requisition | |
| reservation(condition, essential, requirement, qualification, proviso) | |
| rudiment(noun, condition, essence, basic, necessity) | |
| significant(adjective, important, essential, critical, basic) | |
| spadework | |
| specified(adjective, significant, essential, basic, vital) | |
| starting point(expression, theory, guesstimate, premise) | |
| stipulated(adjective, required) | |
| training | |
| treatment | |
| trial | |
| tryout | |
| ultimatum | |
| unavoidable(adjective, set, significant, essential, basic) | |
| undeniability(need, essential, requirement, essentiality) | |
| underlined(important, essential, critical, basic, fundamental) | |
| unforgoable | |
| urgency(noun, want, need, essential, certainty) | |
| urgent(adjective, important, significant, essential, critical) |
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| APA | Smart Define. (2015). prerequisite thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/prerequisite/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "prerequisite thesaurus" https://smartdefine.org/prerequisite/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, prerequisite thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/prerequisite/thesaurus/synonyms>. |
| MLA | Smart Define. "prerequisite thesaurus" 4 September 2015. Web. 22 September 2026. <https://smartdefine.org/prerequisite/thesaurus/synonyms> |