Synonyms for Unsustainable:

• Other synonyms:

  •
  • clean up,
  • biohazard,
  • biological control,
  • the carbon cycle,
  • carbon trading,
  • catalytic converter,
  • carbon sink,
  • carbon-neutral,
  • biodegradable.
  •
  • effectively,
  • undecided,
  • circumstantial,
  • be better/worse off,
  • unique,
  • paradise,
  • situated,
  • face to face,
  • effective,
  • fateful.
  •Other relevant words:
  • sickly,
  • false,
  • unstable,
  • defective,
  • poor,
  • fragile,
  • unjustified,
  • untrustworthy,
  • unreasonable,
  • baseless,
  • faint,
  • specious,
  • invalid,
  • groundless,
  • contestable,
  • unsound,
  • clean,
  • thin,
  • unsupportable,
  • idle,
  • unprovable,
  • Undemonstrable,
  • unverifiable,
  • light,
  • unjustifiable,
  • shaky,
  • vain,
  • unsupported,
  • ailing,
  • infirm,
  • unwarranted,
  • faulty,
  • watery,
  • flimsy,
  • without basis,
  • illogical,
  • cowardly,
  • nerveless,
  • flawed,
  • ungrounded,
  • empty,
  • weak,
  • unauthenticated,
  • ill-founded,
  • flat,
  • feeble,
  • Unsustained,
  • unmaintainable,
  • rickety,
  • indefensible,
  • inadequate,
  • unfounded.

Paraphrases for Unsustainable:

• Equivalence

  • Adjective
    non-sustainable, untenable.
  • Noun, singular or mass
    untenable.

• Forward Entailment

  • Adjective
    sustainable.

• Independent

  • Adjective
    unmanageable, unstable, unworkable, insufferable, impossible, tenable, unreasonable, viable, non-durable, feasible, unconscionable, irrational, unlikely, inadmissible, non-expendable, sustained, durable, volatile, miserable, fragile, precarious, excruciating, indistinguishable.

• Other Related

  • Adjective
    unbearable, unviable, intolerable, unacceptable, non-viable, insupportable, indefensible, unaffordable, unsupportable, excessive, lasting.

Antonyms for Unsustainable:

• adj.

  • not able to be supported in the future
    long-term, tenable, sustainable, suitable, feasible.