Find Synonyms

unsustainable Synonyms

Another word for unsustainable

Choosing another word for unsustainable depends on context, so the 14 synonyms and similar words below are separated across 3 exact definitions and ranked by match 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 unviable once market demand began to slow down."

Strongest
unviable
Strong
unworkable
unfeasible
impractical
Weak
short-lived

• adjective (Context 2)

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

Usage Example

"non-renewable logging practices have severely reduced the region's ancient forest cover."

Strong
non-renewable
destructive
Weak
wasteful

• 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 untenable."

Strongest
untenable
indefensible
Strong
unjustifiable
unfounded
baseless
unsound

Opposites of unsustainable

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

sustainable
tenable
defensible
viable
renewable
justifiable
eco-friendly
feasible
See all opposites of unsustainable

• Nearby Words

unsuspicious
unsuspiciously
unsustainability
unsustainable
unsustainably
unsustained
unswayed

Cite this Entry

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