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

And the more sustainable, the better, according to Lisa Quinn, interior design author and show host with over 25 years of experience in the remodeling industry. — Jason Rueger, USA Today, 21 Aug. 2026

For cultural immersion, a farm-to-table breakfast or cooking class at the on-property sustainable farm Rancho Lola is a perfect fit. — Roger Sands, Forbes.com, 21 Aug. 2026

This doesn’t automatically make this a bad day, but the influence of the taskmaster planet could bring light to what is no longer realistic, let alone sustainable. — Valerie Mesa, PEOPLE, 21 Aug. 2026

The tech offers a vastly safer and more sustainable solution for mass-producing grid-scale energy storage by replacing toxic, scarce metals and flammable solvents with non-toxic, eco-friendly materials. — Mrigakshi Dixit, Interesting Engineering, 20 Aug. 2026