as in sure
having or showing a mind free from doubt
another one of his doubtless predictions that will never come true
Synonyms & Similar Words
Relevance
Antonyms & Near Antonyms
1
as in certainly
without any question
she is doubtless the one and only girl for me
Synonyms & Similar Words
2
as in probably
by reasonable assumption
doubtless you have heard this story before, but I'll tell it anyway
Synonyms & Similar Words
Antonyms & Near Antonyms
Example Sentences
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Recent Examples of doubtless
Bill Goodykoontz,
The Arizona Republic,
29 Nov. 2022
In the tradition of superpower summits, Biden and Xi doubtless hope to declare their meeting a success — if only by the hard-to-measure standard of stabilizing U.S.-China relations.
—
Doyle McManuswashington Columnist,
Los Angeles Times,
13 Nov. 2022
Bryan Hendricks,
Arkansas Online,
15 Feb. 2026
Drescher has doubtless heard the same from time to time.
—
Dessi Gomez,
Deadline,
11 Jan. 2026
See All Example Sentences for doubtless
Adjective
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
In the tradition of superpower summits, Biden and Xi doubtless hope to declare their meeting a success — if only by the hard-to-measure standard of stabilizing U.S.-China relations.
—
Doyle McManuswashington Columnist,
Los Angeles Times,
13 Nov. 2022
Adverb
Even during the regular waterfowl seasons, hunters have doubtless seen a lone snow goose or white-fronted goose alone in a field.
—
Bryan Hendricks,
Arkansas Online,
15 Feb. 2026
Drescher has doubtless heard the same from time to time.
—
Dessi Gomez,
Deadline,
11 Jan. 2026
See All Example Sentences for doubtless
Recent Examples of Synonyms for doubtless
Adjective
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An investigation by the National Transportation Safety Board (NTSB) found that the driver failed to make sure the tracks were clear.
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Make sure the shiny, reflective side is facing out.
Adverb
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That’s certainly fascinating to watch in the world today.
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However, the familial drives of men are something seldom acknowledged by society more broadly, Lewis says, and certainly not to the same degree that women's are.
Adverb
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The stadium appeared to be about half-filled with Ecuadorian fans, probably because of the large contingent of Ecuador natives who live in the area.
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Greenberg tried his best to ignore an irritating ankle injury that had plagued him the last couple of weeks and grimaced under the hazy sunlight as the pitcher, probably 20 or more years his junior, stared him down.
Adjective
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Ship traffic first started to pick up over the weekend as shipping companies became more confident that talks between the US and Iran were progressing.
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Merlin, a 2-year-old duck, has taken the internet by storm, captivating fans with his tiny form-fitting Team Mexico jersey and confident waddle around his home of Mexico City.
Adverb
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And yet, the most gruesome naval battle in Westerosi history surely would have thrilled as a season finale.
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Some of these Bay Area Shakira supporters had surely seen this show before, back when the Colombian pop star entertained some 33,000 music lovers on a chilly June night at Oracle Park in San Francisco in 2025.
Adverb
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Buss was hit in his arm and his ballistic vest likely saved his life.
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Today, the life expectancy has more than doubled, from 35 to 79 years, and Washington would likely be treated with antibiotics, rather than bloodletting, for the throat infection that precipitated his death.
Adjective
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Streeting is an assured communicator with a base of support among parliamentary colleagues, but Burnham is considered the more likely successor.
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But now the western Canadian province, where the popular HBO drama The Last of Us was shot during its first season, is more assured foreign movie or TV series will tap its film tax credit while shooting locally as royalties from oil exploration and drilling once again pour into its coffers.
Adverb
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But the New York Knicks captain and MVP definitely returned the favor in a big way.
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So the two of you are definitely not hanging up the hat after this?
Cite this Entry
“Doubtless.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/doubtless. Accessed 28 Jun. 2026.
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