Find Synonyms

seal Synonyms

Another word for seal

Looking for synonyms for seal? Sourced from our comprehensive thesaurus, here is a list of similar words and another word for seal, organized by relevance and context.
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• noun (Context 1)

A fish-eating aquatic marine mammal with a streamlined body and flippers, primarily native to cold coastal waters.

Usage Example

"We watched a playful pinniped swim effortlessly through the icy waters of the bay."

Strong
pinniped

• verb (Context 2)

To close or fasten tightly to prevent anything from passing in or out.

Usage Example

"She carefully sealed the envelope before dropping it into the mail slot."

Strong
close
shut
secure
fasten

• noun (Context 3)

A device or substance used to join two things together to prevent fluid, gas, or air from escaping.

Usage Example

"The mechanic replaced the rubber gasket around the window to stop the water leak."

Strong
gasket
closure

• verb (Context 4)

To guarantee, secure, or finalize an agreement or decision irrevocably.

Usage Example

"The two executives shook hands to finalize the lucrative business deal."

Strongest
finalize
Strong
conclude
ratify
confirm

• noun (Context 5)

A piece of wax, lead, or other material with an individual design stamped into it, attached to a document or envelope to authenticate it or guarantee it remains unopened.

Usage Example

"The ancient scroll was rolled tightly and secured with the king's royal signet."

Strongest
signet
Strong
stamp
emblem

• verb (Context 6)

To coat a surface with a protective substance to prevent moisture or dirt from penetrating.

Usage Example

"You should waterproof the wooden deck before winter to protect it from the snow and rain."

Strong
waterproof
varnish
Weak
coat

Opposites of seal

Looking for antonyms? The opposite of seal varies depending on the context. Here are a few common opposites:

unseal
open
cancel
nullify
strip
See all opposites of seal

Cite this Entry


Wordmom. (2026). Synonyms for Seal. In Wordmom Thesaurus. Retrieved Oct 15, 2026, from https://wordmom.com/synonyms/seal
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