25 entries under foolish topic. ×

12
trusting(adjective, innocent, naive, gullible)
11
credulous(adjective, pure, innocent, naive)
9
innocent(adjective, plain, pure, naive)
7
naive(adjective, plain, pure, innocent)
7
unsuspecting(adjective, friendly, green, naive)
6
simple(adjective, plain, innocent, naive)
4
unsophisticated(adjective, plain, pure, naive)
2
believing(adjective, innocent, green, naive)
2
green(adjective, honest, plain, naive)
2
silly(adjective, innocent, susceptible, naive)
1
being a sucker(expression, adjective, idiom, innocent)
1
biting(adjective, innocent, susceptible, naive)
1
easily taken in(expression, adjective, idiom, innocent)
1
easy mark(adjective, innocent, green, naive)
1
falling hook line and sinker(expression, adjective, idiom, innocent)
1
kidding oneself(expression, adjective, innocent, susceptible)
1
mark(adjective, innocent, susceptible, naive)
1
sucker(adjective, innocent, susceptible, naive)
1
susceptible(adjective, innocent, naive, unsophisticated)
1
swallowing whole(expression, adjective, innocent, susceptible)
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APASmart Define. (2016). trustful thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/trustful/thesaurus/synonyms
ChicagoSmart Define. 2016. "trustful thesaurus" https://smartdefine.org/trustful/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, trustful thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/trustful/thesaurus/synonyms>.
MLASmart Define. "trustful thesaurus" 4 February 2016. Web. 24 September 2026. <https://smartdefine.org/trustful/thesaurus/synonyms>