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
• sympathize
• relieve
• solace
• alleviate
• allay
• empathize
• lift
• elevate
• calm
• commiserate
• condole
• assuage
• relax
• buoy (up)
• boost
• quiet
• tranquillize
• 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

There was some hesitation because of restrictions on motorized travel in the Boundary Water Canoe Area, but the man agreed to do the job after the state field men assured him the carcass was just outside the area’s boundary. —Jack O'Connor, Outdoor Life, 26 June 2025

The officials assured residents that the Royals will not be able to ask for additional money from taxpayers once a deal is made with the city and county, even if the price of the project goes up after that point. —Alecia Taylor, Kansas City Star, 26 June 2025

Ritter and House Majority Leader Jason Rojas, D-East Hartford, had called the vote on the housing bill after assuring the rank-and-file Lamont was on board. —Mark Pazniokas, Hartford Courant, 26 June 2025

Though Mamdani's presumptive win won't be official until runoff counting is announced early July, Cuomo conceded the nomination, all but assuring the 33-year-old the Democratic mayoral candidacy. —Kathryn Palmer, USA Today, 26 June 2025