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

This innovation focuses on enhancing procedural safety and reliability while ensuring the technology can be scaled for widespread use. —Mrigakshi Dixit, Interesting Engineering, 30 Apr. 2026

The city aims to develop a request for statement of qualifications to help solicit information about how the buildings could be used in practice, and the City Attorney’s office is evaluating to ensure lawful implementation of the measure. —Maura Fox, San Diego Union-Tribune, 30 Apr. 2026

However, avoid planting them too close to the basil, and ensure 8 to 12 inches of spacing around the basil plants. —Michelle Mastro, Martha Stewart, 30 Apr. 2026

Illinois’ education funding formula ensures state funding for public schools never declines, regardless of enrollment. —Micky Horstman, Chicago Tribune, 30 Apr. 2026