60 entries under plain topic. ×

9
clear(adjective, quiet, smooth, simple, easy)
9
unmistakable(adjective, quiet, clear, simple, easy)
7
evident(adjective, clear, simple, easy)
6
apparent(adjective, clear, simple, easy)
6
obvious(adjective, clear, simple, easy)
6
palpable(adjective, clear, certain, definite)
6
patent(adjective, clear, certain, definite)
6
self-evident(adjective, obvious)
6
straightforward(adjective, quiet, clear, simple, easy)
6
understandable(adjective, intelligible)
5
direct(adjective, intelligible)
5
intelligible(adjective, quiet, clear, smooth, easy)
5
legible(adjective, intelligible)
5
open-and-shut(adjective, pretty)
5
visible
4
explicit(adjective, clear, simple, certain)
4
indisputable(adjective, clear, simple, certain)
4
transparent(adjective, quiet, clear, easy, clean)
3
lucid(adjective, quiet, clear, smooth, easy)
3
simple(adjective, clear, easy, straightforward)
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APASmart Define. (2016). self-explanatory thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/self-explanatory/thesaurus/synonyms
ChicagoSmart Define. 2016. "self-explanatory thesaurus" https://smartdefine.org/self-explanatory/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, self-explanatory thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/self-explanatory/thesaurus/synonyms>.
MLASmart Define. "self-explanatory thesaurus" 31 March 2016. Web. 23 September 2026. <https://smartdefine.org/self-explanatory/thesaurus/synonyms>