Synonyms of guaranteeing

guaranteeing

verb

present participle of guarantee

1

as in assuring

to assume responsibility for the satisfactory quality or performance of

the shop will guarantee all work done on the car for 30 days

Synonyms & Similar Words

• assuring
• certifying
• bonding
• pledging
• contracting
• warranting
• guarantying
• insisting
• vowing
• insuring
• undertaking
• testifying (to)
• stipulating
• attesting
• declaring
• adhering
• authenticating
• asserting
• witnessing
• swearing
• vouching (for)
• averring
• covenanting
• plighting
• avouching
• avowing

2

as in ensuring

to make sure, certain, or safe

I can guarantee that you'll feel better after using my product for 30 days

Synonyms & Similar Words

• ensuring
• assuring
• securing
• insuring
• guarantying
• icing
• cinching
• promising
• certifying
• attesting
• vouching
• witnessing
• warranting
• pledging
• swearing

Antonyms & Near Antonyms

• undermining
• weakening
• enfeebling

3

as in declaring

to state clearly and strongly

I guarantee that this movie is better than the last one in the series

Synonyms & Similar Words

• declaring
• asserting
• announcing
• proclaiming
• professing
• affirming
• saying
• explaining
• averring
• promoting
• assuring
• justifying
• defending
• laying down
• avowing
• emphasizing
• upholding
• pronouncing
• advertising
• stressing
• avouching
• convincing
• publicizing
• advancing
• advocating
• boosting
• plugging
• underscoring
• persuading
• blazing
• accenting
• underlining
• championing
• supporting
• accentuating
• reaffirming
• calling
• rationalizing
• espousing
• reasserting

Antonyms & Near Antonyms

• minimizing
• ignoring
• disregarding
• neglecting
• overlooking
• understating

Example Sentences

Recent Examples of guaranteeing

One element could be Paramount setting up a governance structure guaranteeing the independence of news outlets like CBS News and CNN, perhaps through an independent board. — Brent Lang, Variety, 5 Aug. 2026

In May, the University of Chicago unveiled one of the most generous aid packages, guaranteeing free tuition starting in the fall of 2027 for undergraduate students from families with annual income less than $250,000. — Michael T. Nietzel, Forbes.com, 4 Aug. 2026

But now the Carlssons and Celebrinis can make more than that on a four or five-year deal, guaranteeing generational wealth while also setting themselves up for as-yet-unheard-of third contracts at just 26. — James Mirtle, New York Times, 30 July 2026

On March 23, 1932, the miners saw another step forward in guaranteeing their rights. — Elijah Tanall, Encyclopedia Britannica, 29 July 2026

In February 2025, Sanders signed a bill guaranteeing every student free breakfast regardless of free or reduced lunch eligibility. — Arkansas Online, 25 July 2026

When the braids had five or more strands, however, the disk possibilities proliferated, guaranteeing the matrices were all unfaithful. — Lyndie Chiou, Scientific American, 24 July 2026

The stabilization fund is meant to work alongside a program to rehabilitate basic services, labor-law reforms guaranteeing union rights, and a push against corruption in public administration. — Nora Gámez Torres, Miami Herald, 24 July 2026

When the Legislature voted last year to extend the climate program, the provision guaranteeing backup funding wasn’t included. — Ian James, Los Angeles Times, 16 July 2026