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

Keys to success Two key issues at the conference involve guaranteeing that Indigenous peoples and local communities have a say in decisions on their territory, including how conservation programs are designed and how resources are allocated. — David Ginsburg, The Conversation, 20 Oct. 2026

In other words, a Super El Niño could improve the odds of a wetter season without guaranteeing above-average snowfall or widespread drought relief. — Callie Zanandrie, CBS News, 16 Oct. 2026

Sensing can reveal more, and processing can reveal differently, without guaranteeing recognition of what emerges. — Pravir Malik, Forbes.com, 16 Oct. 2026

Others dodge moving objects without mathematically guaranteeing that a collision won’t happen. — New Atlas, 11 Oct. 2026

Kelly also said the company has suspended its practice of guaranteeing an interview to any graduate of Ivy Tech’s energy generation program. — Shelley Jones, Chicago Tribune, 8 Oct. 2026

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