Synonyms of ensure

ensure

verb

in-ˈshu̇r 

as in to assure

to make sure, certain, or safe

regulations that ensure the wholesomeness of our food

Synonyms & Similar Words

• assure
• guarantee
• insure
• secure
• guaranty
• ice
• cinch
• promise
• certify
• vouch
• witness
• warrant
• pledge
• swear
• attest

Antonyms & Near Antonyms

• undermine
• weaken
• enfeeble

Synonym Chooser

How is the word ensure distinct from other similar verbs?

Some common synonyms of ensure are assure, insure, and secure. While all these words mean "to make a thing or person sure," ensure, insure, and assure are interchangeable in many contexts where they indicate the making certain or inevitable of an outcome, but ensure may imply a virtual guarantee.

the government has ensured the safety of the refugees

Where would assure be a reasonable alternative to ensure?

The meanings of assure and ensure largely overlap; however, assure distinctively implies the removal of doubt and suspense from a person's mind.

I assure you that no harm will be done

When could insure be used to replace ensure?

Although the words insure and ensure have much in common, insure sometimes stresses the taking of necessary measures beforehand.

careful planning should insure the success of the party

When is secure a more appropriate choice than ensure?

The words secure and ensure can be used in similar contexts, but secure implies action taken to guard against attack or loss.

sent reinforcements to secure their position

Example Sentences

Recent Examples of ensure

The same healing processes that ensure recovery from lighter burns also can cause intense scarring, inflammation, and even organ failure in more severe cases. —Andrew Paul, Popular Science, 5 Feb. 2026

Everyday Health follows strict sourcing guidelines to ensure the accuracy of its content, outlined in our editorial policy. —Tom Gavin, EverydayHealth.com, 5 Feb. 2026

Originally built in 1849 by the Champawat clan, the historic structure has been meticulously restored to ensure the grand architecture of Rajasthan remains the focus. —Rachel Cormack, Robb Report, 5 Feb. 2026

Elgin police were present to ensure students stayed on sidewalks and were safe while crossing streets. —Mike Danahey, Chicago Tribune, 5 Feb. 2026