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

For example, the spacecraft will vent urine overboard, and NASA guidance systems need to ensure that process doesn’t affect the spacecraft’s trajectory. —Katie Hunt, CNN Money, 26 Mar. 2026

Fish will be flown from Japan daily to ensure freshness, said manager Yuanyuan Li. —Jenna Thompson march 26, Kansas City Star, 26 Mar. 2026

Under the law, these brokers must register with the California Privacy Protection Agency annually, process deletion requests submitted through DROP, and undergo audits to ensure compliance. —Larry Magid, Mercury News, 26 Mar. 2026

Dedicated to ensuring culture is accessible to all, the 10-day event offers a wide range of concession tickets. —Irenie Forshaw, TheWeek, 26 Mar. 2026