DOUBTLESS Synonyms: 89 Similar and Opposite Words

doubtless 1 of 2

adjective

Definition of doubtless

as in sure

having or showing a mind free from doubt another one of his doubtless predictions that will never come true

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Antonyms & Near Antonyms

doubtless

2 of 2

adverb

ˈdau̇t-ləs

as in certainly

without any question she is doubtless the one and only girl for me

Synonyms & Similar Words

as in probably

by reasonable assumption doubtless you have heard this story before, but I'll tell it anyway

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Antonyms & Near Antonyms

Example Sentences

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Recent Examples of doubtless

Adjective

Even moderately keen cornering produces body roll and would bring doubtless admonition from the rear seats. — Mike Duff, Car and Driver, 18 Aug. 2023 And the all-boffo, all-the-time production is exhausting (which is doubtless why the rare quiet moments stand out). — Bill Goodykoontz, The Arizona Republic, 29 Nov. 2022

Adverb

But the show’s creatives have been looking to deftly expand Rowling’s beloved source material and will doubtless find some fresh ways to elevate the story. — James Hibberd, HollywoodReporter, 6 May 2026 Savings here and there are doubtless feasible. — Editorial, Boston Herald, 17 Apr. 2026 See All Example Sentences for doubtless

Recent Examples of Synonyms for doubtless

Adjective

Authorities were not immediately sure what caused the crash, and Cordero-Stutz declined to answer additional questions from reporters.

— Karissa Waddick, USA Today, 7 Sep. 2026
Not sure what happened there, but SeanJo definitely showed up for work.

— Joe Kinsey OutKick, FOXNews.com, 7 Sep. 2026

Definition of sure

Adverb

Indeed, scientists believe that, regardless of whether 2026 breaks the record for hottest year ever, 2027 almost certainly will do so because of the El Niño conditions.

— Mary Randolph, Scientific American, 10 Sep. 2026
When Washington plays at Philadelphia, Drew Stevens will almost certainly become the eighth.

— Barry Svrluga, New York Times, 9 Sep. 2026

Definition of certainly

Adverb

Eddie Hall, probably the UK’s most famous strongman, won the World’s Strongest Man title in 2017 and was the first to deadlift 500kg.

— Rob Tanner, New York Times, 8 Sep. 2026
For example, everyone on the boat and probably innocent citizens in Dubrovnik can tell that Kat and Cooper are still an item.

— Rafaela Bassili, Vulture, 8 Sep. 2026

Definition of probably

Adverb

Both were competitive, and huge television ratings will surely follow.

— Scott Dochterman, New York Times, 15 Sep. 2026
Zendaya was surely hard to miss on the red carpet, dazzling in a custom Prada gown embellished with what appeared to be silver sequins and appliqués and sheer white fabric at the low-cut neckline.

— Skyler Caruso, PEOPLE, 15 Sep. 2026

Definition of surely

Adverb

Such a result would likely create barriers to Trump's legislative agenda and send a signal about public opinion on the president's policy mix throughout his second presidential term.

— Chloe Taylor, CNBC, 10 Sep. 2026
More likely she was hooked by the subliminal stirrings and emotional undertow of the music.

— Literary Hub, Literary Hub, 10 Sep. 2026

Definition of likely

Adjective

Both policies share an emphasis on supporting the commercial space industry and underscore the importance of assured access to space.

— Stephen Clark, ArsTechnica, 21 Aug. 2026
Playing some of the most assured tennis of his career, Brandon Nakashima slowed Rafael Jódar’s roll Wednesday at the Canadian Open in Montreal, beating the red-hot teenager 7-6(3), 6-4 to advance to the biggest final of his career.

— Ava Wallace, New York Times, 13 Aug. 2026