1
indispensable(adjective, important, significant, original, essential)
1
inductive
1
infantile
1
infinitesimal
1
initiative
1
insignificant
1
institutionary
1
insufficient
1
intangible
1
integral(adjective, important, significant, original, essential)
1
intrinsic(adjective, important, significant, original, essential)
1
inventive
1
invisible
1
lacking
1
latent(adjective, hidden, dormant)
1
lead off(expression, adjective, head, beginning, fresh)
1
leading(adjective, head, beginning, opening, original)
1
least(adjective, head, beginning, opening, original)
1
main
1
major(adjective, important, significant, original, essential)
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APASmart Define. (2015). rudimentary thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/rudimentary/thesaurus/synonyms
ChicagoSmart Define. 2015. "rudimentary thesaurus" https://smartdefine.org/rudimentary/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, rudimentary thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/rudimentary/thesaurus/synonyms>.
MLASmart Define. "rudimentary thesaurus" 14 April 2015. Web. 26 September 2026. <https://smartdefine.org/rudimentary/thesaurus/synonyms>