Synonyms of ensure

ensure

verb

in-ˈshu̇r 

as in to assure

to make sure, certain, or safe

regulations that ensure the wholesomeness of our food

Synonyms & Similar Words

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

Antonyms & Near Antonyms

• undermine
• weaken
• enfeeble

Synonym Chooser

How is the word ensure distinct from other similar verbs?

Some common synonyms of ensure are assure, insure, and secure. While all these words mean "to make a thing or person sure," 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 assure be a reasonable alternative to ensure?

The meanings of assure and ensure largely overlap; however, assure distinctively implies the removal of doubt and suspense from a person's mind.

I assure you that no harm will be done

When could insure be used to replace ensure?

Although the words insure and ensure have much in common, insure sometimes stresses the taking of necessary measures beforehand.

careful planning should insure the success of the party

When is secure a more appropriate choice than ensure?

The words secure and ensure can be used in similar contexts, but secure implies action taken to guard against attack or loss.

sent reinforcements to secure their position

Example Sentences

Recent Examples of ensure

Godshalk says to use your thumb and forefinger to ensure each stem is placed equidistant from one another. — Madeline Buiano, Martha Stewart, 19 Sep. 2026

The first is to ensure that prices remain stable, which generally means inflation that is neither too hot, nor too cold. — Scott Horsley, NPR, 19 Sep. 2026

These premium fruits also often require methodical techniques to ensure their signature characteristics, like the precise amount of sunlight or the timing of pruning. — Jessie Yeung, CNN Money, 19 Sep. 2026

Be sure to use time and date's sunrise and sunset calculator to ensure that the sun is safely below the horizon before observing the crescent phase of Venus with a telescope. — Anthony Wood, Space.com, 18 Sep. 2026