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

This Digital Unified Platform capability ensures that data is not just collected, but also contextualized, a key step the company emphasizes for effective AI/ML-readiness. —Daniel Fusch, USA Today, 6 Nov. 2025

For weeks, Pelosi had deflected questions about her political future, insisting her central focus was on ensuring that Prop 50 redistricting ballot measure passed in California. —Lauren Peller, ABC News, 6 Nov. 2025

Rodriguez didn't name nuclear energy specifically, but advocated for businesses to invest in renewable energy as part of the data center boom, and Roys agreed the state should ensure companies invest in upgrades to the state's energy infrastructure and shield ratepayers from higher costs. —Jessie Opoien, jsonline.com, 6 Nov. 2025

According to Rolls-Royce’s engineering highlight notes, each deck lid undergoes wind-resistance testing to ensure durability in high-pressure zones. —Atharva Gosavi, Interesting Engineering, 6 Nov. 2025