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

Furthermore, by holding him back in this series, the Dodgers ensured that Yamamoto would get two starts in the National League Championship Series. — Los Angeles Times, 3 Oct. 2026

Almost every house was then surrounded by adjacent empty lots that had been seized to ensure that no one else would build. — Literary Hub, 2 Oct. 2026

Innovations developed by Italian industry, including the lithium-ion propulsion battery and the new combat management system, will ensure greater stealth, endurance, efficiency, and cyber resilience, as per the release. — Prabhat Ranjan Mishra, Interesting Engineering, 2 Oct. 2026

Part of the brand’s mission is to ensure hairdressers continue to thrive. — Jennifer Weil, Footwear News, 2 Oct. 2026