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 University of Miami Health System and UnitedHealthcare have reached a deal that will let thousands of patients who are insured through United continue to receive in-network care with UHealth doctors. — Michelle Marchante, Miami Herald, 31 July 2026

And with these CDs being FDIC-insured up to $250,000 per account, there's an additional layer of protection to account for here that can make these accounts worth serious exploration in today's unpredictable financial climate. — Matt Richardson, CBS News, 31 July 2026

Interest earned on CDs, which are FDIC insured, is subject to federal, state and local income taxes. — Jeanne Sahadi, CNN Money, 29 July 2026

About 70% of the patients community clinics serve are insured through Medi-Cal, and the rest are either on Medicare or uninsured, with a small portion on private insurance, Silva said. — Taryn Luna, Los Angeles Times, 26 July 2026