65 entries under simple topic. ×

1
square(adjective, innocent, ignorant, naive)
1
sucker(adjective, easy, ready, subject)
1
thick(adjective, dull, slow, silly)
1
unintelligent(adjective, dull, slow, silly)
1
unjaded(fresh, innocent, ignorant, childlike)
1
unpretentious(fresh, innocent, ignorant, childlike)
1
unschooled(adjective, innocent, ignorant, naive)
1
untaught(fresh, innocent, ignorant, childlike)
1
unworldly(adjective, innocent, ignorant, naive)
1
witless(adjective, dull, slow, silly)
0
aboveboard(fresh, innocent, ignorant, childlike)
0
candid(innocent, artless, childlike, trusting)
0
countrified(fresh, innocent, ignorant, childlike)
0
forthright(fresh, innocent, ignorant, childlike)
0
impulsive(fresh, innocent, ignorant, childlike)
0
instinctive(fresh, innocent, ignorant, childlike)
0
lamb(fresh, innocent, ignorant, childlike)
0
lamber(nonresistant, childlike, trusting, unsuspicious)
0
natural(innocent, artless, childlike, trusting)
0
original(fresh, innocent, ignorant, childlike)
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APASmart Define. (2016). gullible thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/gullible/thesaurus/synonyms
ChicagoSmart Define. 2016. "gullible thesaurus" https://smartdefine.org/gullible/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, gullible thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/gullible/thesaurus/synonyms>.
MLASmart Define. "gullible thesaurus" 23 March 2016. Web. 26 September 2026. <https://smartdefine.org/gullible/thesaurus/synonyms>