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

Citizen suits, for example, have extracted millions from heavily polluting oil and gas operations, and ensured that lead pipes in Flint, Michigan, would be removed after its water crisis. — Michael Phillis, Fortune, 8 Aug. 2026

Choosing realistic affordability, rather than relying on your lender's estimate, can help ensure your purchase fits your budget while maintaining your financial well-being. — Deane Biermeier, USA Today, 8 Aug. 2026

Victory could be found in ensuring mistakes are not repeated in future investigations. — Tony Maglio, HollywoodReporter, 8 Aug. 2026

Steps should be taken by the governor to ensure that this does not happen again anywhere in Illinois. — The Editorial Board, Chicago Tribune, 7 Aug. 2026