1
preliminary
1
preliminary act
1
preliminary step
1
prep
1
preparative
1
preparatory
1
preparatory study
1
preparing
1
prepping
1
prerequirement
1
prerequisites
1
pretreatment
1
principal(adjective, important, significant, capital, essential)
1
privation(need, essential, requirement, essentiality)
1
processing
1
propaedeutic
1
provident
1
provisional
1
provisions
1
quintessential(adjective, significant, essential, basic, vital)
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APASmart Define. (2015). prerequisite thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/prerequisite/thesaurus/synonyms
ChicagoSmart Define. 2015. "prerequisite thesaurus" https://smartdefine.org/prerequisite/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, prerequisite thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/prerequisite/thesaurus/synonyms>.
MLASmart Define. "prerequisite thesaurus" 4 September 2015. Web. 22 September 2026. <https://smartdefine.org/prerequisite/thesaurus/synonyms>