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
• empiric
• empirical
• confirmable
• defensible
• justifiable
• provable
• documentable
• checkable
• warrantable
• alleged
• certifiable
• excusable
• 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
• liveable
• satisfactory
• allowable
• reasonable
• permissible
• admissible

Antonyms & Near Antonyms

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

Example Sentences

Recent Examples of sustainable

Choose sustainable and environmentally friendly designs Sustainability isn’t just a trendy term, but an integral part of the design process and Berk advises choosing materials that will weather the elements and won’t need to be replaced every two to three years. —Mariette Williams, USA Today, 21 May 2025

By implication: progressivism is not economically or socially sustainable beyond two or three generations. —Michael Brendan Dougherty, National Review, 21 May 2025

Conservation will be an important element toward sustainable water supply but to avoid future water shortages utilities will still be forced to develop alternative water sources that are more resilient to climate changes. —Bob Maliva, The Orlando Sentinel, 10 May 2025

This iteration just is not gonna be sustainable for this team. —Bryan Toporek, Forbes.com, 9 May 2025