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

With the Strait of Hormuz, a crucial waterway between Iran and Oman where roughly a fifth of the world's oil typically passes through, remaining largely closed after the Iran war began, oil prices have fluctuated, climbing around 40% since the beginning of the war, which is now in its fourth week. —CBS News, 26 Mar. 2026

Iran didn't immediately confirm or deny the death of Alireza Tangsiri, who Israel said oversaw blocking the crucial Strait of Hormuz oil trade route. —Rebecca Shabad, NBC news, 26 Mar. 2026

The Hurricanes have not been shy about playing talented freshmen under Cristobal — Fitzgerald and star wide receiver Malachi Toney were crucial parts of UM’s title-game run — so Dunnigan could see the field quickly. —Adam Lichtenstein, Sun Sentinel, 26 Mar. 2026

New York — A first-of-its-kind decision marked a crucial moment of accountability for social media companies. —Clare Duffy, CNN Money, 26 Mar. 2026