UNSUSTAINABLE: Synonyms and Related Words. What is Another Word for UNSUSTAINABLE?

Need another word that means the same as “unsustainable”? Find 28 synonyms for “unsustainable” in this overview.

The synonyms of “Unsustainable” are: indefensible, undefendable, unarguable, insupportable, refutable, unjustified, unwarranted, unjustifiable, inadmissible, unsound, flimsy, weak, shaky, flawed, defective, faulty, implausible, specious, groundless, unfounded, baseless, invalid, absurd, illogical, irrational, preposterous, senseless, unacceptable

Unsustainable as an Adjective

Definitions of "Unsustainable" as an adjective

According to the Oxford Dictionary of English, “unsustainable” as an adjective can have the following definitions:

  • Not able to be upheld or defended.
  • Not able to be maintained at the current rate or level.
  • Upsetting the ecological balance by depleting natural resources.

Synonyms of "Unsustainable" as an adjective (28 Words)

absurdWildly unreasonable, illogical, or inappropriate.
The absurd excuse that the dog ate his homework.
baselessWithout foundation in fact.
Baseless allegations.
defectiveNot working properly.
Dystrophin is commonly defective in muscle tissue.
faultyHaving a defect.
A faulty brake.
flawed(of a person) having a weakness in character.
A fatally flawed strategy.
flimsyNot convincing.
The flimsy garment fell from her.
groundlessWithout a basis in reason or fact.
The allegations proved groundless.
illogicalLacking orderly continuity.
An illogical fear of the supernatural.
implausible(of an argument or statement) not seeming reasonable or probable; failing to convince.
Gave the teacher an implausible excuse.
inadmissible(especially of evidence in court) not accepted as valid.
He held that such evidence was inadmissible.
indefensibleNot able to be protected against attack.
This behaviour is morally indefensible.
insupportableUnable to be supported or justified.
He had arrived at a wholly insupportable conclusion.
invalidHaving no cogency or legal force.
Invalid reasoning.
irrationalOf a number quantity or expression not expressible as a ratio of two integers and having an infinite and non recurring expansion when expressed as a decimal Examples of irrational numbers are the number and the square root of 2.
Irrational numbers.
preposterousSo unreasonable as to invite derision.
A preposterous suggestion.
refutableAble to be refuted.
senselessLacking sense or understanding or judgment.
A senseless act.
shakyNot safe or reliable; liable to fail or falter.
After a shaky start the Scottish team made superb efforts.
speciousBased on pretense; deceptively pleasing.
A specious claim.
unacceptableNot satisfactory or allowable.
An unacceptable violation of personal freedom.
unarguableAgainst which no argument can be made.
Unarguable proof of conspiracy.
undefendableNot defended or capable of being defended.
His views are undefendable.
unfoundedWithout a basis in reason or fact.
Her fear that she had cancer was unfounded.
unjustifiableIncapable of being justified or explained.
An unjustifiable restriction on their freedom.
unjustifiedNot shown to be right or reasonable.
Unjustified price increases.
unsoundPhysically unsound or diseased.
Dorinda was mentally unsound.
unwarrantedNot justified or authorized.
Unwarranted limitations of personal freedom.
weakRelating to or denoting the weakest of the known kinds of force between particles which acts only at distances less than about 10 cm is very much weaker than the electromagnetic and the strong interactions and conserves neither strangeness parity nor isospin.
Their problems arose from fielding weak teams in league matches.

Usage Examples of "Unsustainable" as an adjective

  • Unsustainable fishing practices.
  • Macroeconomic instability led to an unsustainable boom.
  • Both remarks are unsustainable.

Leave a Comment