64 entries under simple topic. ×

5
original(adjective, plain, important, head)
5
underdeveloped(adjective, crude, naive, hidden)
5
unprocessed(adjective, hard, coarse, natural)
4
unformed(adjective, hard, coarse, natural)
3
foundational(adjective, plain, important, significant)
3
uncompleted(adjective, hard, rough, fresh)
3
unwrought(adjective, hard, coarse, natural)
2
ABCs(straightforward, basic, fundamental, uncomplicated)
2
clear(adjective, straightforward, basic, fundamental)
2
easy(adjective, straightforward, basic, fundamental)
2
plain(adjective, straightforward, basic, fundamental)
2
prefatory(adjective, opening, straightforward, basic)
2
roughhewn(adjective, hard, rough, coarse)
2
sketchy(adjective, coarse, natural, inadequate)
2
straightforward(adjective, basic, fundamental, uncomplicated)
2
substratal(adjective, plain, important, significant)
2
unfashioned(adjective, hard, rough, coarse)
2
unhewn(adjective, hard, rough, coarse)
1
atavistic(adjective, rough, crude, basic)
1
austere(adjective, hard, crude, basic)
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APASmart Define. (2015). rudimentary thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/rudimentary/thesaurus/synonyms
ChicagoSmart Define. 2015. "rudimentary thesaurus" https://smartdefine.org/rudimentary/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, rudimentary thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/rudimentary/thesaurus/synonyms>.
MLASmart Define. "rudimentary thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/rudimentary/thesaurus/synonyms>