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 this rate, even if the leadership eventually recognizes the need to change strategy, China may not have the fiscal or financial space to rebalance the economy toward a more sustainable and diversified growth model. — Oliver Melton, Foreign Affairs, 5 Nov. 2026

Such a move may help MAHA cement itself as a sustainable political fixture. — Beth Mole, ArsTechnica, 5 Nov. 2026

The goal is to create a sustainable habit with slow, steady deposits. — Jason Stauffer, CNBC, 4 Nov. 2026

Accepting it seems healthier, more sustainable than trying to rail against it. — Steve Baltin, Los Angeles Times, 4 Nov. 2026