| simple-minded | |
| simple soul | |
| simpleminded | |
| sitting duck | |
| stooge | |
| sucker | |
| toy | |
| trusting soul | |
| uncritical | |
| unknowing | |
| unsophisticate | |
| unsophisticated | |
| wide-eyed | |
| yokel | |
| artless one | |
| aw-shucks | |
| dewy | |
| inexperienced person | |
| new hand(noun, recruit, novice, tenderfoot) | |
| not difficult(expression, idiom) |
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| APA | Smart Define. (2015). naif thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/naif/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "naif thesaurus" https://smartdefine.org/naif/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, naif thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/naif/thesaurus/synonyms>. |
| MLA | Smart Define. "naif thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/naif/thesaurus/synonyms> |