| member(noun, branch, tail, arm, stem) | |
| appendage(noun, branch, tail, arm, stem) | |
| louvre | |
| pinna(noun, arm, fringe, paddle, quill) | |
| tail fin(noun, expression, idiom) | |
| wing(noun, branch, tail, stem, member) | |
| Little Phoebe | |
| airfoil(noun, arm) | |
| barb | |
| break water(verb, expression, idiom) | |
| buck | |
| fishtail | |
| five-dollar bill(expression, idiom, money) | |
| five-spot | |
| flash | |
| fluke | |
| grand | |
| hundred-dollar bill(expression, idiom, money) | |
| limb(noun, branch, tail, member, appendage) | |
| natation |
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| APA | Smart Define. (2015). fin thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/fin/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "fin thesaurus" https://smartdefine.org/fin/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, fin thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/fin/thesaurus/synonyms>. |
| MLA | Smart Define. "fin thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/fin/thesaurus/synonyms> |