60 entries under plain topic. ×

13
naive(adjective, open, simple, easy, clean)
13
unaffected(adjective, open, simple, reasonable, easy)
12
natural(adjective, open, simple, reasonable, clean)
12
simple(adjective, clean, honest, natural)
11
unsophisticated(adjective, simple, clean, honest)
10
artless(adjective, simple, easy, clean, honest)
8
guileless(adjective, simple, honest, natural)
8
innocent(adjective, open, simple, easy, clean)
8
unassuming(adjective, simple, honest, modest)
6
unschooled(adjective, simple, easy, clean, honest)
4
candid(adjective, easy, honest, natural)
4
unartificial(adjective, simple, clean, honest)
3
frank(adjective, open, easy, honest)
3
honest(adjective, natural, straightforward, innocent)
3
straightforward(adjective, open, simple, easy, honest)
2
childlike(adjective, simple, easy, honest)
2
open(adjective, simple, easy, honest)
2
sincere(adjective, open, simple, easy, honest)
2
square(adjective, honest, innocent, meek)
2
trusting(adjective, open, simple, easy, clean)
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APASmart Define. (2015). unstudied thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/unstudied/thesaurus/synonyms
ChicagoSmart Define. 2015. "unstudied thesaurus" https://smartdefine.org/unstudied/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, unstudied thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/unstudied/thesaurus/synonyms>.
MLASmart Define. "unstudied thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/unstudied/thesaurus/synonyms>