15
flipper(noun, tail, arm, member, navigation)
9
five
9
quint
9
quintet
8
cinque
8
fivesome
8
quintuplet
7
hand(noun, grip, arm, palm, paddle)
7
pentad
6
Phoebe
6
V
6
arm(noun, branch, stem, member, appendage)
6
flapper(noun, tail, member, appendage, limb)
6
louver
6
tailfin
5
5
5
feather(noun, tuft, plumage)
5
fins
5
fiver(noun, money)
5
stabilizer(noun, arm)
<1234510>
11 years ago|5k views|share |citing 
APASmart Define. (2015). fin thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/fin/thesaurus/synonyms
ChicagoSmart Define. 2015. "fin thesaurus" https://smartdefine.org/fin/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, fin thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/fin/thesaurus/synonyms>.
MLASmart Define. "fin thesaurus" 13 April 2015. Web. 20 September 2026. <https://smartdefine.org/fin/thesaurus/synonyms>