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

Or, physicians may end up signing a personal guarantee that exposes household assets even if the practice is properly insured. — Shawn L. Davenport, Forbes.com, 16 Sep. 2026

And even once the licence has been secured, new drivers can expect to pay an average of £1,241 to get insured. — The Week Uk, TheWeek, 15 Sep. 2026

Auto insurance is up 50% since 2019 However, the cost of insuring a car jumped by about 50% since July 2019, according to data from the Bureau of Labor Statistics through July. — Sarah Agostino, CNBC, 14 Sep. 2026

The campus broke ground in April at a long vacant office complex on Stockton Boulevard and will primarily serve patients who are insured through Medi-Cal, California’s Medicaid program. — Mathew Miranda, Sacbee.com, 9 Sep. 2026