Synonyms of sustainable

sustainable

adjective

sə-ˈstā-nə-bəl 

1

as in justifiable

capable of being defended with good reasoning against verbal attack

a line of argument that is probably not sustainable in a public forum against skilled debaters

Synonyms & Similar Words

• justifiable
• viable
• acceptable
• legitimate
• maintainable
• supportable
• defendable
• rational
• defensible
• tenable
• reasonable
• sensible
• allowable
• verifiable
• admissible
• unobjectionable
• well-grounded
• provable
• explainable
• explicable
• warrantable
• passable
• exceptionable
• confirmable

Antonyms & Near Antonyms

• untenable
• unjustifiable
• irrational
• ridiculous
• unsustainable
• absurd
• extreme
• unreasonable
• illogical
• unsound
• indefensible
• outrageous
• unacceptable
• objectionable
• insupportable
• unfounded
• inexplicable
• groundless
• unexplainable

2

as in verifiable

capable of being proven as true or real

has no sustainable claim to the property without a deed or some other document

Synonyms & Similar Words

• verifiable
• supportable
• demonstrable
• empirical
• confirmable
• defensible
• justifiable
• provable
• documentable
• checkable
• excusable
• warrantable
• certifiable
• alleged
• well-founded
• presumed
• assumed
• vindicable
• guessed
• suspected
• conjectured
• surmised

Antonyms & Near Antonyms

• unsustainable
• unsupportable
• insupportable
• unverifiable
• unprovable
• debatable
• indemonstrable
• disputable
• refutable
• disprovable

3

as in endurable

capable of being endured

the general didn't think that such heavy casualties could be sustainable for much longer

Synonyms & Similar Words

• endurable
• sufferable
• tolerable
• supportable
• acceptable
• bearable
• survivable
• livable
• adequate
• satisfactory
• allowable
• reasonable
• permissible
• admissible

Antonyms & Near Antonyms

• intolerable
• painful
• bad
• terrible
• unbearable
• cruel
• horrible
• unfortunate
• awful
• vicious
• unacceptable
• harsh
• dire
• appalling
• hideous
• shocking
• dreadful
• monstrous
• gruesome
• vile
• wretched
• rotten
• ghastly
• horrifying
• horrid
• intense
• acute
• extreme
• nightmarish
• horrendous
• frightful
• grisly
• macabre
• lurid
• agonizing
• unsupportable
• nasty
• harrowing
• excruciating
• insupportable
• unendurable
• insufferable
• offensive
• torturous
• deplorable
• repugnant
• repulsive
• disgusting
• evil
• abhorrent
• revolting
• distasteful
• loathsome
• obnoxious
• sickening
• noxious
• heinous
• tormenting
• abominable
• unspeakable
• foul
• odious
• piercing
• nauseating

Example Sentences

Recent Examples of sustainable

At Kering, the nature team sits under the sustainable programs umbrella, alongside circularity and its Material Innovation Lab (MIL). — Bella Webb, Vogue, 22 Oct. 2026

Future success will require Space42 to turn its technological capabilities, capital commitments and international partnerships into commercially viable services that can compete across markets at scale and at a sustainable cost. — Melissa Hancock, Fortune, 21 Oct. 2026

Stoett argues that if a market is used to encourage removal, the commercial activity should exist because the species needs to be reduced, contained, or eradicated—not because the goal is to establish a sustainable fishery for that species. — Victoria Malloy, Time, 21 Oct. 2026

There is no one-size-fits-all approach to working capital, and taking the time to understand the tradeoffs can help businesses choose financing that supports sustainable growth rather than creating additional financial pressure. — Andrew Coon, Forbes.com, 20 Oct. 2026