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

Durazo notes that insured Allianz customers with emergency medical benefits may have access to the Allyz mobile app, which includes up to three virtual or in-person doctor visits per trip at no additional cost. — Christopher Elliott, Forbes.com, 28 Aug. 2026

The return will be guaranteed, the principal won't change and, unlike investing, your account will be FDIC-insured up to $250,000, giving you ample protection with an account of this size. — Matt Richardson, CBS News, 27 Aug. 2026

Some of those creative approaches for systems range from complex pharmaceutical reimbursement calculations to new efforts to keep patients insured. — Daniel Payne, STAT, 25 Aug. 2026

Social Security uses the word insured to describe whether your work record meets the requirements for certain benefits. — Bydavid Schepp, Encyclopedia Britannica, 25 Aug. 2026