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

Everyday Health follows strict sourcing guidelines to ensure the accuracy of its content, outlined in our editorial policy. —Emily Kay Votruba, EverydayHealth.com, 5 Mar. 2026

When curating her fashion month packing list, Vergara ensured an elegant slip dress made the cut. —Daisy Maldonado, InStyle, 5 Mar. 2026

Thise helps seal the outer cuticles and ensure your curls don’t become frizzy, plus tomato, which is supposed to support moisture retention. —Eden Stuart, Glamour, 5 Mar. 2026

It’s built for extremes with IP68 waterproofing and 5x saltwater resistance, ensuring sea splashes or sweat won't stop its 50W of powerful audio. —Juhi Wadia, PC Magazine, 5 Mar. 2026