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

In total, authorities allege the network carried out or attempted more than 100 jackpotting attacks against banks and credit unions insured by the Federal Deposit Insurance Corporation and the National Credit Union Administration. —Antonio María Delgado, Miami Herald, 28 Dec. 2025

But the confusion becomes a serious problem when staying insured depends on navigating new rules, paperwork and deadlines. —Chicago Tribune, Twin Cities, 26 Dec. 2025

Now prenups are being pitched to young professional women as a way to take charge of their finances and insure better remuneration. —Jennifer Wilson, New Yorker, 22 Dec. 2025

As of December 2025, 40 states and the District of Columbia have implemented Medicaid expansion, insuring about 20 million Americans. —Robert Applebaum, The Conversation, 19 Dec. 2025