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

In 2024, global economic losses from natural disasters reached $368 billion, yet less than half of that was insured. —Felicia Jackson, Forbes.com, 3 Sep. 2025

Imagine trying to run a restaurant, print shop, or small manufacturing firm — but you’re locked out of credit, can’t insure your inventory, and your only customers are also blocked from building wealth. —Ed Gaskin, Boston Herald, 31 Aug. 2025

Electric vehicles are insured by the same carriers as internal combustion engine (ICE) automobiles. —Brian Sloan, CNBC, 28 Aug. 2025

To determine its list, Faye Travel Insurance looked at data from thousands of travelers who booked and insured their trips through the company for 2025. —Katie Nadworny, Travel + Leisure, 26 Aug. 2025