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

Though the bill is yet to be finalized, the orbital station is cast as the linchpin of sustainable exploration to enable longer stays, partner investment and cislunar monitoring. —Josh Dinner, Space.com, 4 Sep. 2025

Native plants have lots of long-term benefits, said Deryn Davidson, a sustainable landscape state specialist at the Colorado State University Extension. —Eduardo Cuevas, USA Today, 4 Sep. 2025

Ahead of the December ceremony, this year’s nominations span both British and international talent while supporting the BFC Foundation, which funds education initiatives, business mentoring, and grants that help emerging designers build sustainable careers. —Essence, 4 Sep. 2025

As director of Stanford University’s sustainability accelerator, Cui is an expert in nanotechnology, materials science and sustainable energy. —Alexandra Harrell, Sourcing Journal, 4 Sep. 2025