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

Trantalis says people can now rest assured that the yellow water problem is a thing of the past. — Susannah Bryan, Sun Sentinel, 30 Oct. 2026

Audiences have been assured that two big final episodes lie ahead, including by season one competitor Mohammed, who caught up with THR this week. — Lily Ford, HollywoodReporter, 29 Oct. 2026

Jabo, Bobcek, and County Attorney Scott McClure assured them the process is common enough and well-vetted. — Shelley Jones, Chicago Tribune, 29 Oct. 2026

With the opposition united in its ambition to replace Netanyahu but divided over how to govern afterward, neither political bloc is assured of a parliamentary majority and the final outcome could take weeks to determine. — Efrat Lachter, FOXNews.com, 27 Oct. 2026