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

Creating a market mechanism where compatibility is the price of admission forces traditional defense companies to compete with agile startups, ultimately lowering unit costs and guaranteeing better integration for the entire allied enterprise. — Dan Driscoll, Foreign Affairs, 28 Sep. 2026

What was his reaction emotionally when his agent told him the Heat was guaranteeing him $60 million? — Barry Jackson, Miami Herald, 28 Sep. 2026

In addition to guaranteeing the accuracy of delivery dates, Locus’ real-time Delivery Promise Management engine allows retailers and brands to offer their customers a range of choices that fit their individual needs. — Arthur Zaczkiewicz, Footwear News, 25 Sep. 2026

Deferring the start of the lease extends its end date, too, guaranteeing longer cash flows for its financial backers. — Liz Hoffman, semafor.com, 24 Sep. 2026

Crop innovation is seen as critical to guaranteeing long-term food supplies. — Jessie Yeung, CNN Money, 19 Sep. 2026

Kansas would be guaranteeing Arizona State two points, but the ensuing free kick would have given KU a chance to flip the field. — Taylor Eldridge, Kansas City Star, 19 Sep. 2026

By guaranteeing rental income and reducing upfront construction costs, the city hopes to woo developers to break ground while lowering rents for low-to-moderate-income families. — Ryan MacAsero, Mercury News, 2 Sep. 2026

While head coaches and players come and go, sporting directors ensure that a club’s operating strategy remains in place, guaranteeing a baseline of efficiency through a singular vision for how a club should work. — Sebastian Stafford-Bloor, New York Times, 26 Aug. 2026