Synonyms of cardinal

cardinal

adjective

as in main

coming before all others in importance

the cardinal rule of medicine: do no harm

Synonyms & Similar Words

• main
• greatest
• highest
• primary
• predominant
• dominant
• foremost
• principal
• big
• first
• chief
• central
• key
• supreme
• leading
• sovereign
• paramount
• overriding
• primal
• premier
• master
• great
• prior
• capital
• grand
• major
• number one
• overbearing
• distinguished
• preeminent
• eminent
• top
• outstanding
• overmastering
• arch
• senior
• illustrious
• notable
• numero uno
• star
• noteworthy
• important
• signal
• stellar
• high-level
• superior
• prestigious
• noble
• influential
• momentous
• mighty
• famous
• incomparable
• significant
• celebrated
• renowned
• unequaled
• unparalleled
• famed
• matchless
• unsurpassed

Antonyms & Near Antonyms

• last
• least
• minor
• trivial
• unimportant
• insignificant
• secondary
• negligible
• slight
• subordinate
• collateral
• inferior
• inconsequential
• trifling
• inconsiderable
• subsidiary

Synonym Chooser

How is the word cardinal different from other adjectives like it?

Some common synonyms of cardinal are essential, fundamental, and vital. While all these words mean "so important as to be indispensable," cardinal suggests something on which an outcome turns or depends.

a cardinal rule in buying a home

Where would essential be a reasonable alternative to cardinal?

The meanings of essential and cardinal largely overlap; however, essential implies belonging to the very nature of a thing and therefore being incapable of removal without destroying the thing itself or its character.

conflict is essential in drama

When could fundamental be used to replace cardinal?

The words fundamental and cardinal are synonyms, but do differ in nuance. Specifically, fundamental applies to something that is a foundation without which an entire system or complex whole would collapse.

fundamental principles of algebra

When is vital a more appropriate choice than cardinal?

While in some cases nearly identical to cardinal, vital suggests something that is necessary to a thing's continued existence or operation.

cut off from vital supplies

Example Sentences

Recent Examples of cardinal

Each academic school hosts their own ceremony, with students attending various departments — plus deans and senior leadership — all clad in their cardinal and gold regalia, marching behind their banners across the campus. — Staff Report, Daily News, 20 Aug. 2026

Breaking my cardinal rule for noir, Ellroy tries to get by on plot alone. — Carolyn Kellogg, The Atlantic, 8 July 2026

Around that time, the Count-Duke is believed to have commissioned the artist to paint both him and Italian cardinal Francesco Barberini—a nephew of Pope Urban VIII— to commemorate the latter’s diplomatic mission to the Spanish court. — Theo Belci, Artforum, 7 July 2026

Drop Shots 😱 A player in the girls’ singles was disqualified from her match after committing a cardinal Wimbledon sin. — Ava Wallace, New York Times, 5 July 2026

Phrases Containing cardinal

• cardinal virtue

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