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 mountains above had unleashed a cataclysmic, deluge that swept 62 miles (100 km) downstream, killing hundreds and burying entire communities in the worst natural disaster to hit Nepal in years. — Ross Adkin, CNN Money, 30 Aug. 2026

The effect of the wealth consolidation carefully, and secretly, orchestrated by the SEC and Big 10 has been not catastrophic to those not in these respective leagues, but at least cataclysmic. — Fort Worth Star-Telegram, 26 Aug. 2026

Barring a cataclysmic injury, all of this translates into an eventual Young contract extension. — Scott Fowler, Charlotte Observer, 30 July 2026

But the shockwaves of this cataclysmic blast will stretch far beyond the fifth planet. — Richard Edwards, Space.com, 23 July 2026

The pound’s loss of reserve currency status wasn’t a cataclysmic event but a slow decline over decades. — Philipp Carlsson-Szlezak, Fortune, 17 July 2026

Despite ample warnings from the National Weather Service that potentially cataclysmic winds were bound for the city in the heart of its fire season, Bass headed to Ghana for a diplomatic event and was in Africa as the city burned. — John Scott Lewinski, The Washington Examiner, 11 July 2026

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

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