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

Economist Matthew Kahn argues insurance companies should be allowed to charge more to insure houses in flood or fire-risk areas; otherwise, other homeowners are subsidizing homeowners to take more risks in dangerous areas. —Richard McGahey, Forbes.com, 18 Sep. 2025

My money is safe High-yield savings accounts are FDIC-insured, which means deposits are protected up to $250,000. —Andreina Rodriguez, CNBC, 18 Sep. 2025

Also consider whether your current home insurance policy sufficiently insures you financially in the event of extreme weather events that could destroy your home or possessions. —Jeanne Sahadi, CNN Money, 16 Sep. 2025

Recently, designers also made millimetric adjustments to the best-selling AIRism T-shirt, tweaking the shirt’s inner seams to insure that the neckline would lie flatter, with no bumps. —Lauren Collins, New Yorker, 15 Sep. 2025