Synonyms of unbreakable

unbreakable

adjective

as in durable

not able to be broken

The two of them had an unbreakable bond of friendship.

The plastic is virtually unbreakable.

Related Words

• durable
• enduring
• permanent
• lasting
• everlasting
• immortal
• imperishable
• inextinguishable
• incorruptible
• indestructible
• perpetual
• sturdy
• undying
• deathless
• indissoluble
• indelible
• ineradicable
• ineffaceable
• strong
• tough
• inexpungible

Dissimilar Words

• mortal
• transient
• fragile
• transitory
• delicate
• flimsy
• frail
• breakable
• impermanent
• perishable
• destructible
• extinguishable

Example Sentences

Recent Examples of unbreakable

Logan wields unbreakable, atomically sharp adamantium claws, yet enemies feel like bloated punching bags that require mindless button-mashing to stagger. — Gabriel Zamora, PC Magazine, 10 Sep. 2026

These two former Texas Rangers lead an unforgettable cast of characters across the American west in this sweeping odyssey defined by unrequited longing, unbreakable friendship, brutal frontier justice, and an unwavering pursuit of a meaningful life. — Nellie Andreeva, Deadline, 8 Sep. 2026

Protect Your Sleep and Your Boundaries Poor sleep makes brain fog and mood swings infinitely worse, so treat your bedtime like an unbreakable appointment. — Tabitha Britt, Flow Space, 1 Sep. 2026

That truce, born from the scars of Europe’s bloody religious wars and America’s own colonial theocracies, was deemed unbreakable, but Falwell was making inroads toward prying it apart. — Literary Hub, 25 Aug. 2026