Find Synonyms

leakproof Synonyms

Another word for leakproof

Choosing another word for leakproof depends on context, so the 10 synonyms and similar words below are separated across 2 exact definitions and ranked by match strength.
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• adjective (Context 1)

Designed or sealed to prevent liquid, gas, or confidential information from escaping or entering.

Usage Example

"She packed her soup in a leaktight container so it would not spill inside her backpack."

Strongest
leaktight
watertight
Strong
airtight
hermetic
impervious
impermeable
sealed

• verb (Context 2)

To make a container, pipe, or structure resistant or impervious to leaks.

Usage Example

"The plumber used silicone sealant to seal the joints around the kitchen sink."

Strong
seal
waterproof
caulk

Opposites of leakproof

The opposite of leakproof shifts depending on context. Common opposites include:

leaky
porous
permeable
See all opposites of leakproof

• Nearby Words

leakage
leaker
leakless
leakproof
leaky
lean
leaning

Cite this Entry

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