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 program is designed to provide military bases with an independent and reliable power source to ensure that national security missions remain operational regardless of the status of the commercial power grid. —Aman Tripathi, Interesting Engineering, 23 Apr. 2026

Housekeeping runs with the polish of a hotel, maintaining the ease of a private stay while ensuring everything remains in place. —Condé Nast, Condé Nast Traveler, 23 Apr. 2026

Its role is to create a water current through the colony, ensuring a steady flow of nutrient-bearing water across the feeding polyps. —Samantha Agate, Charlotte Observer, 23 Apr. 2026

This will help ensure that students, staff and faculty can ask questions and express views without pressure to conform to an official institutional stance. —Shannon Watkins, Twin Cities, 23 Apr. 2026