Synonyms of insure

insure

verb

in-ˈshu̇r 

as in to ensure

to make sure, certain, or safe

took steps to insure the timely completion of the project

Synonyms & Similar Words

• ensure
• assure
• guarantee
• secure
• guaranty
• ice
• cinch
• certify
• promise
• vouch
• witness
• warrant
• pledge
• attest
• swear

Antonyms & Near Antonyms

• undermine
• weaken
• enfeeble

Synonym Chooser

How is the word insure distinct from other similar verbs?

Some common synonyms of insure are assure, ensure, and secure. While all these words mean "to make a thing or person sure," insure sometimes stresses the taking of necessary measures beforehand.

careful planning should insure the success of the party

When can assure be used instead of insure?

In some situations, the words assure and insure are roughly equivalent. However, assure distinctively implies the removal of doubt and suspense from a person's mind.

I assure you that no harm will be done

How is ensure related to other words for insure?

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

When is secure a more appropriate choice than insure?

The words secure and insure 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 insure

The cost to insure a 21-year-old in Denver would rise by $1,057 a year, while the increase would be $5,186 a year for a 60-year-old on the Western Slope, according to the Division of Insurance. —Meg Wingerter, Denver Post, 22 July 2025

Construction crews then re-dredge the river and re-armor its sides, insuring that the hydrological conditions that caused the flooding will be the same, or worse, the next time. —John Seabrook, New Yorker, 21 July 2025

New Mexico's Medicaid program insures 34% of the state's population − the nation's highest proportion of residents covered by the public health insurance program, according to a February 2025 report by the health policy nonprofit KFF. —Ken Alltucker, USA Today, 30 July 2025

Get your engagement and wedding rings insured Most homeowners policies have low coverage limits for valuables, typically about $1,500. —Liz Knueven, CNBC, 25 July 2025