ENSURE Synonyms: 18 Similar and Opposite Words

Q: 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

Q: 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

Q: 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

Q: 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

ensure

verb

in-ˈshu̇r

Definition of ensure

as in to assure

to make sure, certain, or safe regulations that ensure the wholesomeness of our food

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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

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of ensure So, to ensure optimum conditions for the chickens, the team employed computational fluid dynamics (CFD) software to model how warm air moved through the building. — Christopher McFadden, Interesting Engineering, 17 Oct. 2026 Some of their fellow investigators go so far as to argue that deadbots should only be available with psychological supervision, to ensure that best practices are in place, and to minimize the risk of harm. — Lissa Soep, Vox, 17 Oct. 2026 And the quick turnover ensures that the rice’s temperature never dips too chilly. — Jenn Harris, Los Angeles Times, 17 Oct. 2026 And Christopher at the front desk knew to check in on us at the right hour to ensure our departure was taken care of. — Condé Nast, Condé Nast Traveler, 17 Oct. 2026 See All Example Sentences for ensure

Recent Examples of Synonyms for ensure

Verb

But while fans wait to see what happens, Davies, despite no longer being involved in the show, assured that a new series was definitely happening and there wouldn’t be too long to wait.

— Alex Ritman, Variety, 14 Oct. 2026
So, Correa repeatedly assured voters that abandoning the dollar would be catastrophic and was not on his agenda.

— Steve H. Hanke, Fortune, 13 Oct. 2026

Definition of assure

Verb

Of course, the Nasdaq-100 or a similar tech-heavy index, isn’t guaranteed to deliver 21% returns each year for a decade going forward.

— Sarah Cannon, Fortune, 18 Oct. 2026
Keep in mind that monitoring services cannot guarantee prevention of identity theft or detect every form of medical fraud.

— Kurt Knutsson, FOXNews.com, 18 Oct. 2026

Definition of guarantee

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ensuing

ensure

ensured

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“Ensure.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/ensure. Accessed 20 Oct. 2026.

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Synonyms of ensure

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Synonyms of ensure

verb

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'Insure' vs. 'Ensure' vs. 'Assure'

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