Appendages
Fins and appendages are semantically related. In some cases you can use "Fins" instead a noun "Appendages".
Fins
Appendages and fins are semantically related. Sometimes you can use "Appendages" instead a noun "Fins".
Mutual synonyms
Both words in one sentence
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Finally SCP-861 is a large, elastic ball of "pseudorganic matter" capable of manifesting numerous different organs and appendages, ranging from feathered wings to shark fins.
Source: Our Angels Are Different -
Basically everyone in SpongeBob SquarePants but the title character and Sandy lack fingers, instead having tentacles, claws, fins, and other finger-less appendages which usually gain mitten-like digits when needed.
Source: Fingerless Hands
Cite this Source
Fins and Appendages. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/appendages/fins
Appendages & Fins. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/appendages/fins>.
Fins or Appendages. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/appendages/fins.
Google Ngram Viewer shows how "appendages" and "fins" have occurred on timeline