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 Ossoff’s crucial reelection on the horizon, Democrats voted to pay for a full-time, dedicated party chair. — Patricia Murphy, AJC.com, 28 Aug. 2026

The district has completed cleaning of the school and repairs to crucial parts of its heating, ventilation and air-conditioning system, Jacksonville/North Pulaski School District Superintendent Jeremy Owoh said in a message to families Friday. — Arkansas Online, 28 Aug. 2026

Failing to get enough of this crucial mineral can lead to serious health problems. — Anahad O’Connor, Washington Post, 27 Aug. 2026

Association records and incident reports will then become crucial to assist police in seeking such RPOs. — Evonne Andris, Miami Herald, 27 Aug. 2026