Synonyms of cataclysmal

cataclysmal

adjective

variants or cataclysmic

1

as in disastrous

bringing about ruin or misfortune

a cataclysmal decision to plunge the nation into war

Synonyms & Similar Words

• disastrous
• fatal
• unfortunate
• catastrophic
• destructive
• damning
• ruinous
• fateful
• calamitous
• apocalyptic
• damaging
• harmful
• detrimental
• pernicious
• adverse
• hapless
• deleterious
• evil
• injurious
• luckless
• hurtful
• prejudicial
• ill-fated
• baneful
• ill-starred
• noxious
• baleful
• ill

Antonyms & Near Antonyms

• happy
• lucky
• fortunate
• fortuitous
• providential
• fair
• optimistic
• golden
• promising
• bright
• encouraging
• hopeful
• fluky
• propitious
• rosy
• upbeat
• auspicious
• heartening
• rose-colored

2

as in devastating

causing or tending to cause destruction

a cataclysmal landslide that virtually wiped out the village

Synonyms & Similar Words

• devastating
• devastative
• disastrous
• destructive
• annihilatory
• ruinous
• deadly
• poisonous
• lethal
• fatal
• calamitous
• fell
• murderous
• antibiotic
• killer
• harmful
• virulent
• detrimental
• pernicious
• biocidal
• deleterious
• mortal
• vital
• baleful
• deathly
• pestilent

Antonyms & Near Antonyms

• protective
• nondestructive
• creative
• productive
• constructive
• useful
• helpful
• harmless
• formative
• innocent
• innocuous
• healthy
• preservative
• healthful
• wholesome
• inoffensive
• ameliorative
• nonlethal
• nonfatal
• salubrious

3

as in turbulent

marked by sudden or violent disturbance

the French Revolution was one of the great cataclysmal events in modern history

Synonyms & Similar Words

• turbulent
• tumultuous
• convulsive
• stormy
• sporadic
• spasmodic
• tempestuous
• boisterous
• noisy
• riotous
• furious
• fitful
• clamorous

Antonyms & Near Antonyms

• peaceful
• calm
• undisturbed
• tranquil
• serene
• unperturbed
• placid
• untroubled
• unshaken

Example Sentences

Recent Examples of cataclysmal

The earliest Daoist community, known as the Celestial Masters, believed that their founder, Zhang Daoling, had made a special contract with the deified Laozi that would protect them through a cataclysmic end of times. — Michael Naparstek, The Conversation, 6 July 2026

Each nova explosion triggers a dramatic surge in T CrB's apparent brightness, as radiation cast out in the cataclysmic event finally reaches us, having spent approximately 3,000 years racing through the near-perfect vacuum of space. — Anthony Wood, Space.com, 23 June 2026

This has been a cataclysmic failure of his making. — NBC news, 21 June 2026

Amend and extend The situation in private credit has, so far, been a sort of slow-moving train wreck as opposed to a cataclysmic derailing. — Tobias Burns, CNBC, 28 May 2026

That world ended in cataclysmic war, the one that claimed the life of Alfred Louis Webb and so many others. — Literary Hub, 27 May 2026

While the Zizian ideology is extremist in nature, a less extreme version of the same fears surrounding the cataclysmic potential of AI are a common concern among AI alignment experts, machine-learning engineers, and even frontier AI companies. — Daniel Boguslaw, ArsTechnica, 27 May 2026

The relative inertia in the January transfer market was very nearly a cataclysmic mistake, as was the installation of Igor Tudor. — Sebastian Stafford-Bloor, New York Times, 25 May 2026

Characteristically, Czernowin’s control of timbre, texture, and structure yields a kind of cataclysmic grandeur. — Alex Ross, New Yorker, 18 May 2026