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

And not only will the principal remain secure and the interest be dependable, but savers won't have to worry about other, adverse economic factors as well, considering that CD accounts are FDIC-insured up to $250,000 per account. —Matt Richardson, CBS News, 4 Mar. 2026

In parallel, Medicare and Medicaid set payment increases well below the cost of delivering care, driving hospitals and physicians to make up the difference by charging higher rates to the privately insured. —Robert Pearl, Twin Cities, 1 Mar. 2026

Reliable cars that are fuel efficient and affordable to insure are the most affordable for drivers. —Charles Singh, USA Today, 27 Feb. 2026

Rother challenged the notion that State Farm agents have a duty to inspect properties before insuring them. —J.c. Hallman, Oklahoman, 27 Feb. 2026