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

Steinberg assured me progress has been made on several fronts with regard to concussions. — Michael Arkush, STAT, 14 Sep. 2026

She was delighted by the story and assured me that had Bernard seen Eddie decapitate his work for a laugh, he would have been doubled over alongside my father. — Jesse McLaren, Vulture, 11 Sep. 2026

Because of the shift in approach, with only weekend games assured of both pregame and postgame shows, the Heat also are altering their approach with their broadcast talent. — Ira Winderman, Sun Sentinel, 11 Sep. 2026

The movie’s metaphors are mixed; its sense of purpose is poetic and assured. — Amy Nicholson, Los Angeles Times, 11 Sep. 2026