Synonyms of crucial

crucial

adjective

ˈkrü-shəl 

as in key

of the greatest possible importance

water is crucial to our survival

Synonyms & Similar Words

• key
• critical
• vital
• essential
• pivotal
• fundamental
• necessary
• basic
• decisive
• elementary
• instrumental
• urgent
• requisite
• life-and-death
• indispensable
• pressing
• weighty

Antonyms & Near Antonyms

• minor
• unimportant
• insignificant
• trivial
• inconsequential

Synonym Chooser

How does the adjective crucial contrast with its synonyms?

The words acute and critical are common synonyms of crucial. While all three words mean "of uncertain outcome," crucial suggests a dividing of the ways and often a test or trial involving the determination of a future course or direction.

a crucial vote

Where would acute be a reasonable alternative to crucial?

While the synonyms acute and crucial are close in meaning, acute stresses intensification of conditions leading to a culmination or breaking point.

an acute housing shortage

How are the words critical and acute related as synonyms of crucial?

Critical adds to acute implications of imminent change, of attendant suspense, and of decisiveness in the outcome.

the war has entered a critical phase

Example Sentences

Recent Examples of crucial

In a movie depicting a sound team, and one where sound is so crucial, their work cannot be underestimated. —Pete Hammond, Deadline, 14 May 2026

By 2016, polar codes were crucial to 5G cellular networks, which Huawei dominates. —Gautam Mukunda, Twin Cities, 14 May 2026

Scrutiny of Altman’s leadership comes at a crucial time for the company and its competitors, Musk’s own AI firm and Anthropic, formed by a group of seven ex-OpenAI leaders. —ABC News, 14 May 2026

Getting a good suspect description is crucial when police are responding to a crime in progress. —James Taylor, CBS News, 14 May 2026