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

Bloomberg reported this week that Oracle’s decision to invoke force majeure on a New Mexico data center sent the cost of insuring its debt against default to a record. — Amanda Gerut, Fortune, 26 Sep. 2026

Patti Kanegae, a former resident of Largo, said her bill to insure her older home there doubled over four years, from $2,000 to $4,000, despite improvements to protect it against damaging hurricane winds. — Ron Hurtibise, Sun Sentinel, 25 Sep. 2026

Hitting the brakes and handing control to the federal government just insures that China and other adversaries will leave us in the dust. — The Week Us, TheWeek, 21 Sep. 2026

Major carriers from large swaths of the state are now refusing to insure even low-risk properties with minimal danger of burning. — Paige St. John, Los Angeles Times, 20 Sep. 2026