| easy mark(expression, simple, fool, innocent, jerk) | |
| egret(noun, bird) | |
| emu(noun, bird) | |
| energumen | |
| fair game(expression, simple, fool, innocent, jerk) | |
| falcon(noun, bird) | |
| fathead(simple, fool, innocent, jerk, clown) | |
| fellah | |
| finch(noun, bird) | |
| flamingo(noun, bird) | |
| fou | |
| frogman | |
| fruit-cake(noun, slang, sick, mad person) | |
| fruitcake(noun, mad, nut, fanatic, lunatic) | |
| gamin | |
| goldfinch(noun, bird) | |
| goo-goo(noun, slang, sick, mad person) | |
| goof(noun, slang, sick, mad person) | |
| goon | |
| gowk |
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| APA | Smart Define. (2016). loon thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/loon/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "loon thesaurus" https://smartdefine.org/loon/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, loon thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/loon/thesaurus/synonyms>. |
| MLA | Smart Define. "loon thesaurus" 29 February 2016. Web. 22 September 2026. <https://smartdefine.org/loon/thesaurus/synonyms> |