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

Under the ordinance, the county would ensure people in custody would receive hygiene supplies such as soap and menstrual products. —Ben Wheeler june 4, Kansas City Star, 4 June 2026

Users of the parking garage will emerge outside before entering the museum — an attempt by the foundation to ensure tourists mix and mingle before and after their visit to the tower. —A.d. Quig, Chicago Tribune, 4 June 2026

Best to come in smaller groups or early to ensure a seat. —Condé Nast, Condé Nast Traveler, 4 June 2026

As frustrations mount and impatience grows, some experts say the state is simply doing its due diligence to ensure every voter's voice is heard. —Austin Turner, CBS News, 4 June 2026