Find Synonyms

fin Synonyms

Another word for fin

Choosing another word for fin depends on context, so the 15 synonyms and similar words below are separated across 4 exact definitions and ranked by match strength.
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• noun (Context 1)

A flattened appendage on various marine and aquatic animals, such as fish and cetaceans, used for propulsion, steering, and balancing in the water.

Usage Example

"The shark's dorsal flipper sliced ominously through the surface of the water."

Strong
flipper
pinna
Weak
fluke

• noun (Context 2)

A fixed or movable aerodynamic or hydrodynamic surface on a vehicle, such as an aircraft, rocket, or surfboard, designed to provide stability or control.

Usage Example

"The rocket was designed with four carbon-fiber fins at its base to ensure a stable flight path."

Strong
stabilizer
tailfin
skeg
vane
airfoil
hydrofoil
foil

• verb (Context 3)

To move through the water by moving one's fins or using flippers.

Usage Example

"The scuba diver finned gracefully over the colorful coral reef."

Strong
swim
paddle
Weak
kick

• noun (Context 4)

A five-dollar bill.

Usage Example

"He handed the cashier a fiver and told her to keep the change."

Strongest
fiver
five-spot

• Nearby Words

filtrate
filtration
fimi
fin
fin whale
finagle
finagler

Cite this Entry

Wordmom. (2026). Synonyms for Fin. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/synonyms/fin
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