Synonyms & Antonyms of assure

1 to ease the grief or distress of
  • a minister choosing just the right words to assure the grieving parents of the fallen soldier

Synonyms for assure

Words Related to assure

Near Antonyms for assure

Antonyms for assure

2 to make sure, certain, or safe
  • security measures that assured our safety

Synonyms for assure

Words Related to assure

Near Antonyms for assure

See the Dictionary Definition 

Frequently Asked Questions About assure

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

Learn More About assure

Time Traveler for assure

Time Traveler

The first known use of assure was in the 14th century

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Thesaurus Entries Near assure




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Cite this Entry

“Assure.” Thesaurus, Merriam-Webster, Accessed 21 May. 2022.

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More from Merriam-Webster on assure

Nglish: Translation of assure for Spanish Speakers

Britannica English: Translation of assure for Arabic Speakers


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