21 entries under uncomplicated topic. ×

15
fundamental(adjective, clear, simple, plain, pure)
4
initial(adjective, simple, opening, straightforward, basic)
3
essential(adjective, simple, plain, pure, important)
3
introductory(adjective, simple, opening, straightforward, basic)
2
abecedarian(adjective, simple, straightforward, basic, fundamental)
2
beginning(adjective, simple, straightforward, basic, fundamental)
2
clear(adjective, simple, pure, straightforward, basic)
2
plain(adjective, simple, pure, straightforward, basic)
2
simple(adjective, pure, straightforward, basic, fundamental)
2
substratal(adjective, simple, plain, important, significant)
1
ABCs(adjective, simple, straightforward, basic, fundamental)
1
easy(adjective, simple, straightforward, basic, fundamental)
1
facile(adjective, simple, straightforward, basic, fundamental)
1
prefatory(adjective, simple, straightforward, basic, fundamental)
1
preliminary(adjective, simple, straightforward, basic, fundamental)
1
primo(adjective, simple, straightforward, basic, fundamental)
1
simplest(adjective, simple, straightforward, basic, fundamental)
1
simplex(adjective, simple, straightforward, basic, fundamental)
1
simplified(adjective, simple, straightforward, basic, fundamental)
1
straightforward(adjective, simple, basic, fundamental)
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APASmart Define. (2015). foundational thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/foundational/thesaurus/synonyms
ChicagoSmart Define. 2015. "foundational thesaurus" https://smartdefine.org/foundational/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, foundational thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/foundational/thesaurus/synonyms>.
MLASmart Define. "foundational thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/foundational/thesaurus/synonyms>