Synonyms|387Antonyms|77|Broader|1Narrower|9Related|620

65 entries under simple topic. ×

3
guileless(adjective, innocent, ignorant, naive)
2
brainless(adjective, dull, slow, silly)
2
dumb(adjective, dull, slow, silly)
2
jejune(fresh, innocent, ignorant, childlike)
2
open(adjective, calm, easy, informal)
1
dense(adjective, dull, slow, silly)
1
dull(adjective, slow, silly, foolish)
1
frank(adjective, innocent, ignorant, naive)
1
half-witted(adjective, dull, slow, silly)
1
harmless(adjective, fresh, innocent, ignorant)
1
idiotic(adjective, dull, slow, silly)
1
inane(adjective, dull, slow, silly)
1
innocuous(adjective, fresh, innocent, ignorant)
1
insensate(adjective, dull, slow, silly)
1
like a babe in the woods(expression, idiom, fresh, innocent)
1
mindless(adjective, dull, slow, silly)
1
moronic(adjective, dull, slow, silly)
1
obtuse(adjective, dull, slow, silly)
1
senseless(adjective, dull, slow, silly)
1
slow(adjective, calm, dull, informal)
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ChicagoSmart Define. 2016. "gullible thesaurus" https://smartdefine.org/gullible/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, gullible thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/gullible/thesaurus/synonyms>.
MLASmart Define. "gullible thesaurus" 23 March 2016. Web. 25 September 2026. <https://smartdefine.org/gullible/thesaurus/synonyms>