Synonyms of sudden

sudden

adjective

ˈsə-dᵊn 

as in unexpected

not expected

the sudden snowstorm resulted in thousands of evening commuters abandoning their cars on impassable highways

Synonyms & Similar Words

• unexpected
• abrupt
• unforeseen
• unanticipated
• unlooked-for
• unlikely
• surprising
• startling
• improbable
• unplanned
• unintended

Antonyms & Near Antonyms

• anticipated
• foreseen
• expected
• predicted
• prophesied
• unsurprising

Synonym Chooser

How does the adjective sudden contrast with its synonyms?

Some common synonyms of sudden are abrupt, headlong, impetuous, and precipitate. While all these words mean "showing undue haste or unexpectedness," sudden stresses unexpectedness and sharpness or violence of action.

flew into a sudden rage

When might abrupt be a better fit than sudden?

Although the words abrupt and sudden have much in common, abrupt stresses curtness and a lack of warning or ceremony.

an abrupt refusal

When is it sensible to use headlong instead of sudden?

While in some cases nearly identical to sudden, headlong stresses rashness and lack of forethought.

a headlong flight from arrest

When is impetuous a more appropriate choice than sudden?

The meanings of impetuous and sudden largely overlap; however, impetuous stresses extreme impatience or impulsiveness.

an impetuous lover proposing marriage

Where would precipitate be a reasonable alternative to sudden?

While the synonyms precipitate and sudden are close in meaning, precipitate stresses lack of due deliberation and implies prematureness of action.

the army's precipitate withdrawal

Example Sentences

Recent Examples of sudden

Homes in coastal communities like Long Beach, Malibu and Dana Point have been destroyed, while sudden waves have caused considerable flooding on city streets in places like Newport Beach. — Michele Gile, CBS News, 14 Oct. 2026

As a result, sudden freezing temperatures can cause materials to fracture easily. — Mrigakshi Dixit, Interesting Engineering, 14 Oct. 2026

Like Dillane’s Willoughby, wily and louche, who quite literally sweeps Marianne off her injured foot and into a giggly, schoolyard kind of chaotic sudden romance. — Ryan Lattanzio, IndieWire, 13 Oct. 2026

The interior drew its own grim commentary—a few guests expressed feeling a sudden compulsion to jump from the top of the spiral ramp to their death. — Wendy S. Walters, Architectural Digest, 12 Oct. 2026

Phrases Containing sudden

• all of a sudden

Video

'All over sudden' vs. 'All of a sudden'

Is the correct phrase 'all over sudden' or 'all of a sudden'? Senior Editor Emily Brewster explains.

Transcript

Sometimes a word that sounds like the right word and feels like the right word isn't actually the right word. It's an eggcorn. Something that happens sooner than expected doesn't happen "all over sudden," it happens "all of a sudden." Sudden here is an obsolete noun meaning an unexpected occurrence.