Synonyms of assure

assure

verb

ə-ˈshu̇r 

1

as in to reassure

to ease the grief or distress of

a minister choosing just the right words to assure the grieving parents of the fallen soldier

Synonyms & Similar Words

• reassure
• comfort
• soothe
• cheer
• console
• uplift
• relieve
• sympathize
• solace
• alleviate
• allay
• empathize
• lift
• elevate
• calm
• commiserate
• condole
• assuage
• relax
• buoy (up)
• boost
• quiet
• tranquilize

Antonyms & Near Antonyms

• distress
• discourage
• worry
• trouble
• torment
• torture
• upset
• demoralize
• intensify
• aggravate
• fret
• worsen
• annoy
• irritate
• dishearten
• harass
• irk
• pester

2

as in to ensure

to make sure, certain, or safe

security measures that assured our safety

Synonyms & Similar Words

• ensure
• guarantee
• insure
• secure
• guaranty
• ice
• cinch
• promise
• certify
• vouch
• witness
• warrant
• attest
• pledge
• swear

Antonyms & Near Antonyms

• undermine
• weaken
• enfeeble

Synonym Chooser

How is the word assure distinct from other similar verbs?

Some common synonyms of assure are ensure, insure, and secure. While all these words mean "to make a thing or person sure," assure distinctively implies the removal of doubt and suspense from a person's mind.

I assure you that no harm will be done

How does the word ensure relate to other synonyms for assure?

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

Where would insure be a reasonable alternative to assure?

The synonyms insure and assure are sometimes interchangeable, but insure sometimes stresses the taking of necessary measures beforehand.

careful planning should insure the success of the party

In what contexts can secure take the place of assure?

In some situations, the words secure and assure are roughly equivalent. However, secure implies action taken to guard against attack or loss.

sent reinforcements to secure their position

Example Sentences

Recent Examples of assure

All the used books at The Reading Room are $8, an uncomplicated pricing system that assures that everything is a fair price and means that, with some searching, patrons may stumble upon a great deal. —Margaret Littman, Southern Living, 13 Mar. 2026

For families Families were flitting around the lobby, pool terrace, and elevators throughout my stay, so rest assured that this is a great spot to bring the kids—not to mention that the attached shopping mall and exceptionally safe surrounding neighborhood are reassuring for any parent. —Condé Nast, Condé Nast Traveler, 12 Mar. 2026

The possibility of a Chase and Taylor flirtation causing a rift with Miranda is briefly raised and just as swiftly quashed — through large mouthfuls of chips and salsa, Taylor assures Miranda at the sip-and-see that there is no there there. —Kathleen Walsh, Vulture, 12 Mar. 2026

In one of the play’s loveliest moments, the narrator unwittingly shares his secret project with his college crush, a young woman named Sam who responds in such a compassionate and simpatico manner that a life together is all but assured. —Greg Evans, Deadline, 12 Mar. 2026