65 entries under simple topic. ×

59
naive(adjective, calm, person, dull, light)
24
credulous(adjective, person, feelings, silly)
19
green(adjective, informal, innocent, thick)
19
innocent(adjective, person, feelings, naive)
13
foolish(adjective, dull, slow, silly)
12
ingenuous(adjective, innocent, susceptible, ignorant)
11
unsophisticated(adjective, innocent, green, susceptible)
11
unsuspecting(adjective, fresh, innocent, green)
9
wide-eyed(adjective, person, feelings, innocent)
8
easy(adjective, calm, informal, relaxed)
8
unsuspicious(adjective, calm, light, soft)
6
artless(adjective, innocent, ignorant, naive)
6
inexperienced(adjective, silly, stupid, innocent)
6
stupid(adjective, dull, slow, silly)
5
trusting(adjective, calm, person, light)
4
childlike(adjective, innocent, ignorant, naive)
4
confiding(fresh, innocent, ignorant, childlike)
4
ignorant(adjective, silly, stupid, innocent)
4
simple-minded(adjective, silly, stupid, fresh)
3
callow(adjective, fresh, raw, innocent)
10 years ago|16k views|share |citing 
APASmart Define. (2016). gullible thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/gullible/thesaurus/synonyms
ChicagoSmart Define. 2016. "gullible thesaurus" https://smartdefine.org/gullible/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, gullible thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/gullible/thesaurus/synonyms>.
MLASmart Define. "gullible thesaurus" 23 March 2016. Web. 23 September 2026. <https://smartdefine.org/gullible/thesaurus/synonyms>