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

Apparently, neither the American Challenger nor the tugboat Hunter were insured, the Press Democrat reported in 2021. —Steven Rosenfeld, Mercury News, 1 May 2025

Applicants for a permit must first have a current license to operate from the Lake County Health Department, a diagram showing the size of the vehicle or trailer, an Illinois sales tax certificate and proper insurance listing the city as an additional insured, according to city regulations. —Steve Sadin, Chicago Tribune, 15 Apr. 2025

Rodney had, as part of his job, monitored prison conditions to insure that people with mental-health issues were placed in proper, legal confinement. —Sarah Stillman, New Yorker, 14 Apr. 2025

Properties with outdated systems or non-standard construction materials, such as old wiring or lead pipes, can be significantly more expensive to insure, if coverage is available at all. —Ilona Limonta-Volkova, Forbes.com, 29 Apr. 2025