Find Antonyms

unsustainable Antonyms

Opposite of unsustainable

Because the opposite of unsustainable shifts with each meaning, the 13 antonyms and opposite words below are separated across 3 exact definitions and ranked by contrast strength.
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• adjective (Context 1)

Not able to be maintained at the current rate or level over a long period of time.

Usage Example

"The company's rapid spending proved sustainable once market demand began to slow down."

Strongest
sustainable
viable
Strong
feasible
manageable
enduring

• adjective (Context 2)

Causing damage to the environment by depleting natural resources faster than they can be replenished.

Usage Example

"sustainable logging practices have severely reduced the region's ancient forest cover."

Strongest
sustainable
renewable
Strong
eco-friendly
green

• adjective (Context 3)

Not able to be upheld, defended, or justified against criticism or legal challenge.

Usage Example

"The defense attorney's argument was dismissed by the judge as legally sustainable."

Strongest
sustainable
tenable
defensible
Strong
justifiable
valid
sound

Similar words to unsustainable

Words similar to unsustainable shift depending on context. Common synonyms include:

untenable
indefensible
unviable
unjustifiable
unworkable
non-renewable
unfeasible
unfounded
See all synonyms of unsustainable

• Nearby Words

unsuspicious
unsuspiciously
unsustainability
unsustainable
unsustainably
unsustained
unswayed

Cite this Entry

Wordmom. (2026). Antonyms for Unsustainable. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/antonyms/unsustainable
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