166 entries under natural topic. ×

14
clean(adjective, clear, easy, sharp, plain)
14
sincere(adjective, clear, open, easy, flat)
13
ingenuous(adjective, clean, honest, plain, pure)
13
childlike(adjective, open, easy, honest, plain)
13
frank(adjective, honest, plain, straightforward)
13
homely(adjective, soft, plain, informal, relaxed)
12
guileless(adjective, honest, plain, pure)
12
informal(adjective, easy, plain, ordinary, familiar)
12
open(adjective, clear, easy, flat, honest)
12
single(adjective, complete, honest, plain, pure)
12
unostentatious(adjective, soft, honest, plain, informal)
11
absolute(adjective, complete, flat, limit, clean)
11
green(adjective, clean, honest, plain, informal)
11
sheer(adjective, hard, complete, right, severe)
11
unadulterated(adjective, complete, clean, total, plain)
10
homespun(adjective, dull, plain, informal, coarse)
10
lowly(adjective, quiet, mean, lower, poor)
10
rustic(adjective, open, easy, plain, informal)
10
thick(adjective, dull, slow, silly, foolish)
10
unalloyed(adjective, separate, complete, clean, total)
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APASmart Define. (2016). simple thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/simple/thesaurus/synonyms
ChicagoSmart Define. 2016. "simple thesaurus" https://smartdefine.org/simple/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, simple thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/simple/thesaurus/synonyms>.
MLASmart Define. "simple thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/simple/thesaurus/synonyms>